Build a Shelter That Lasts: Practical Steps for Any Situation

Key Points

• A well-designed, properly sited shelter keeps people from environmental hazards, protects them from outside threats, and brings peace of mind in times of emergency. Never lose sight of functionality and structural integrity when designing your shelter.
• Evaluate existing and potential terrain hazards to determine the safest place to build your shelter. Seek out natural windbreaks and ensure you have easy access to essential resources such as water and firewood. Stay away from low-lying areas that may flood.
• Use healthy, natural materials, modern techniques, and salvaged materials to create or rehabilitate shelters. Each material has its own specific benefits. Tarps can provide waterproofing in a matter of seconds, while branches and leaves can add to your insulation.
• Use step-by-step guides. When building something very specific, such as a lean-to, a debris hut, or an emergency snow shelter, follow a step-by-step guide. Prioritize stability, insulation, and ventilation to ensure durability and comfort.
• Make it a point to inspect your shelter closely and regularly, and identify and reinforce weakened areas. Identify and expedite emergency fixes, including those that pose public safety hazards, such as leaks and compromised structures, and maintain records to address wear and tear in future upkeep.
• Use additional weatherproofing and insulation techniques to make your shelter more long-lasting. Seal gaps and add layers of natural insulation and waterproofing materials to prepare for inclement weather.

Last update on 2026-05-18 / Affiliate links / Images from Amazon Product Advertising API

Building and repairing a shelter requires basic tools, sturdy materials, and practical skills to create a safe, durable structure. Whether you’re preparing for emergencies, exploring the great outdoors, or improving your home, you can #TestItOut.

This process combines artful techniques with careful planning to achieve the best possible results. First, pick an ideal location. Ensure the ground will be level and safe, then select your materials, such as wood, tarp, and nails, that will best fit your environment.

Repairing shelters addresses the areas of greatest weakness. For instance, you can repair rips with waterproof adhesive tape or strengthen connections with screws and metal corner brackets.

Little things, such as swinging a hammer properly or accurately measuring a cut, are huge game changers.

This guide outlines some simple approaches and time-saving tricks to shelter planning, construction, and repair. You’ll feel more confident and save time and money in the process!

Shelter Building Basics

A safe, stable shelter is the bedrock of survival, providing an anchor away from environmental extremes, hazards, and trauma and serving as the basis for physical and mental health.

Extreme weather can be intimidating, and knowing you have a safe place to sleep is important. This is why it’s important to be aware of the basic principles of shelter building.

It all starts with selecting appropriate materials. It ensures that every design decision leads to a building that best serves your daily life and well-being.

Understand Shelter Purposes

A shelter is life-saving, offering refuge from the sun, rain, snow, wind, and other outdoor hazards. It greatly reduces the risks of hypothermia and frostbite.

Additionally, it acts as a physical barrier to pests, animals, and wet earth.

Beyond physical security, it grants a psychological sanctuary during high-stakes moments, around a table or in a home, radiating ease and soothing nerves.

With a minimum of 4 inches of insulation under the ground, a well-insulated design keeps warmth in, and a balanced ventilation system keeps moisture from accumulating.

All these factors lead to deeper, more restorative rest, which can greatly enhance your energy and, in turn, your focus.

Plan Your Shelter Design

Begin with a pencil, paper, and a flexible layout, focusing on size, functionality, and occupant requirements. Consider materials such as branches and tarps for wind resistance and warmth in shelter.

Design features, including an elevated sleeping platform, wind-resistant doorways, and cross ventilation, make the shelters more functional and comfortable.

For instance, compacted leaves formed an excellent insulating layer against sub-zero temperatures, and a deliberate design kept everything grounded and safe in high winds.

Choose the Right Location

Choose a location on higher ground, not in low areas that may flood.

Choose your site with an eye toward natural windbreaks and proximity to resources, including firewood and potable water.

Remove hazards such as overhanging branches to prevent injury.

Gather Essential Tools

Basic tools, like an everyday carry knife and some cordage, can be enough. Pack waterproofing materials such as tarps, and keep your tools in order to save time.

Field test your shelter by sleeping in it overnight, making modifications as necessary for comfort and durability.

Last update on 2026-05-18 / Affiliate links / Images from Amazon Product Advertising API

Essential Shelter Building Materials

Choosing appropriate building materials is one of the most important aspects of building a shelter. Rely on what nature provides, what the modern world offers, or what you can find in salvage.

Getting to know their applications and advantages builds a firm, functional foundation. Each material type offers distinct benefits that can enhance one’s ability to survive or respond to a shelter emergency.

Natural Materials

Branches and logs often provide the structure for a strong shelter. First, a ridge pole, preferably 8 feet long, strengthens the center of lean-to designs.

Added stability is provided by ribbing sticks, placed at a 45-degree angle to the ridge pole.

To keep warm, leaves, grass, and moss make great insulation— the more you have, the better! Packing debris under your shelter insulates the ground and traps heat.

Rocks used to hold down materials can also act as windbreaks.

Widely available natural materials include bark, pine boughs, and, in colder climates, even snow. Keeping structures small helps reduce heat loss and makes them simpler and easier to seal.

Modern Materials

Tarps and emergency mylar space blankets provide immediate shelter, cover during outdoor excursions, and protection from weather elements. Durable ropes and paracord offer convenient, reliable options for firmly tying down components.

Lightweight, portable items, such as collapsible poles, further improve ease of assembly.

Modern materials take less time to deploy than their natural counterparts and provide more effective waterproofing. They might not be as accessible in remote areas.

Material Type	Benefits	Drawbacks
Natural	Abundant, insulating	Time-intensive
Modern	Quick, durable	Less sustainable

Salvaged Materials

Salvaged materials such as pallets, sheets of metal, or tarps can be used creatively. Such materials come largely from local construction sites or from abandoned industrial or commercial areas.

Do inspect for safety and structural integrity before using anything. Though availability can be an issue, using salvaged materials is a great way to reduce waste.

How to Build a Lean-To Shelter

A lean-to shelter is a great, low-impact, ultralight option for wilderness camping. Its minimalist design, made using natural or locally available materials, provides shelter from the elements and versatility to blend into almost any environment.

Building a lean-to takes a bit of ingenuity and thought, but it can be done. Here’s how to build one the right way, step by step.

1. Find a Supporting Structure

Begin by finding a solid tree, boulder, or other stable object to use as one anchor point for the shelter. The structure needs to be sturdy enough to withstand wind and other external forces.

To best design this shelter, ensure the roof height and pitch allow a 45-degree angle to divert rainwater or snowmelt. Most ideal supporting structures are tall, flat, and stable.

Find trees with thick, sturdy trunks or rocks that won’t move. A checklist for this step would be to make sure it is stable, the right height, easily accessible, and resistant to severe weather.

2. Gather Framing Materials

Gather three sturdy, straight branches—about 6 to 8 feet long—for the frame. These need to be sturdy and straight.

Use smaller branches as cross supports to make the structure more stable. Other materials, such as vines, paracord, or rope, will help secure the frame.

Suggested materials include sturdy hardwood branches, pliable twigs for tying them together, and tarps to reinforce the shelter if desired.

3. Create the Angled Roof

To use the frame you’ve made, stand it up at a 45-degree angle and lean it against the support you’ve selected. Finally, tie it down tightly using rope or vines so it doesn’t move.

Extend the roof far enough out to offer adequate protection. For additional comfort, make sure the opening of your frame faces away from prevailing winds.

4. Add Insulation and Weatherproofing

Add additional leaves, grass, or pine needles on the roof for insulation. Tarps or other waterproof fabric make it more weather-resistant.

Make sure to spread insulation evenly to retain heat. Materials such as dry leaves, moss, or plastic sheeting are effective.

5. Reinforce the Structure

Test all the joints and connections to make sure they’re rock solid. Provide additional bracing to deficient areas and regularly inspect for deterioration.

Repair techniques range from retightening lashings to refitting or replacing misaligned or loose branches.

Build a Debris Hut Shelter

A debris hut is one of the most effective survival shelters that you can build using the natural resources around you to keep you warm and protected. It’s designed to trap your body heat effectively, making it perfect for surviving overnight in the wild.

This adaptable shelter works well for one or two people and focuses on minimizing space while maximizing insulation.

1. Construct the Main Frame

You’ll need a ridge pole—the backbone of your structure. Your ridge pole needs to be thick and strong as it will be holding the weight of the debris. Tie or anchor one end to a stable object, such as a tree, or prop up on a forked branch.

Then, insert support branches at 45-degree angles or so on each side of the ridge pole to create an A-frame. These branches need to be sturdy enough to support the weight of multiple feet of debris. You can use hardwood branches, preferably at least 2 inches thick.

A checklist for your frame includes: one ridge pole (6–8 feet), 8–10 angled branches, and smaller sticks for cross-support.

2. Pile on Debris

Then cover the frame with natural materials such as dry leaves, pine needles, grass, or bark. Once you’ve completed the hut, make sure you have at least 3 feet of debris all around it for insulation.

Pack it as tightly as you can so that there aren’t any gaps that wind or rain can get through. Good debris would be dry oak leaves, evergreen boughs, and shredded bark.

3. Create an Entrance

Keep the entrance as small as possible to trap heat. Using flexible materials such as woven grass or bark strips forms a door flap.

Place it so that you’re out of the path of prevailing winds, if applicable.

4. Insulate the Interior

Put a good foot of leaves or hay inside, particularly in the sleeping area, to make it warmer.

5. Ensure Proper Ventilation

Add small ventilation holes at the top to let air circulate and prevent condensation.

Last update on 2026-05-18 / Affiliate links / Images from Amazon Product Advertising API

Construct an Emergency Snow Shelter

Constructing an emergency snow shelter is an important and potentially lifesaving skill when caught in extreme winter conditions.

An emergency snow shelter offers life-saving insulation from extreme cold and high winds. It is a trusted place of last resort when no other shelter is accessible.

Here are step-by-step instructions to guide you through building an efficient snow trench shelter.

1. Locate a Suitable Snowdrift

Start by locating a snowdrift that’s deep enough to give you a clear 6 feet of shelter. A slight hill can make digging easier by providing built-in depth.

Choose locations where the snow is built up and robust to reduce the risk of collapse during construction.

Choose a spot protected from the wind, since this will help provide more insulation and retain heat.

Use this checklist for evaluation:

• Depth of snow: at least 6 feet
• Stability: compact without loose layers
• Protection: sheltered from the wind

2. Dig an Entrance Tunnel

Dig a small, low tunnel entrance into the shelter. Keep it low to stay warm, but wide enough to accommodate movement. For tools, use a snow shovel, or your hands in a pinch or emergency.

Techniques such as digging directly down to the desired chamber depth and angling the bottom slightly upward to reduce heat loss are useful.

Steps for digging:

• Start low to conserve heat
• Clear away excess snow to prevent blockages
• Maintain a smooth, compact surface

3. Hollow Out the Main Chamber

Using available hand tools or your hands, hollow out a chamber that provides enough space for you to lie down comfortably and move enough to stay warm.

If you can, try to make your walls at least 12 inches thick to maximize insulation.

Adjust dimensions for more occupants, but maintain the chamber’s narrowness.

Suggested dimensions:

• Length: 7 feet
• Width: 3 feet
• Wall thickness: 12–18 inches

4. Insulate the Entrance

Pack snow around the opening very snugly to prevent drafts from entering. If you have access to natural materials, improve your insulation using sticks, branches, or other leaves.

Don’t forget to keep your main entrance free of snow so it is accessible.

Insulation tips:

• Layer snow evenly around openings
• Use lightweight barriers for additional coverage

5. Provide Ventilation

Punch one or two small ventilation holes near the top of the shelter to improve airflow and prevent carbon dioxide buildup. Keep an eye on these vents to prevent excessive condensation from building up in the shelter.

Continue to adjust as needed as occupants and weather conditions change.

Checklist:

• Size of vents: 2–4 inches in diameter
• Location: high near the roof’s center
• Frequency of checks: every hour

Shelter Repair: Assessment and Planning

Keeping a strong, healthy shelter starts with a strategic plan to identify and address problems before they arise. Perform planned maintenance and emergency repair to maintain shelter safety and usability. Create a blueprint for future stewardship by documenting all conditions.

Below, we discuss these steps in depth.

Inspect for Damage Regularly

The early detection of an issue can make all the difference. Start by requiring inspections at least every six months or after extreme weather incidents. Inspect the roof for missing shingles, sagging, or leaks.

Next, inspect your walls for cracks, rot, or evidence of pest infestation. Inspect the foundation closely for signs of settling, such as uneven brick lines or water damage. If the structure is wooden, look for any signs of warping or splintering.

Use a checklist to ensure you address major components, such as the roof, walls, doors, windows, and floors.

Quickly repairing the problems that are noticed, whether it’s a minor leak or a door hinge, avoids the need for expensive repairs down the line.

Prioritize Repairs

Once damage is visible, classify and prioritize repairs by severity. Structural components such as the roof and walls should be prioritized first, as they serve as the first line of defense against the elements.

A major one, such as a hole in the roof, requires urgent repair to stop water damage. Categorize repairs: critical (e.g., broken beams), necessary (e.g., minor cracks), and cosmetic (e.g., peeling paint).

Set a timeline to address the highest priority concerns, including those that affect safety and comfort.

Document Existing Conditions

Keeping clear and consistent documentation will help track the shelter’s status. Take detailed photographs of the roof, wall, and other features to document their condition at each inspection.

Document all damages, insurance claim repair dates, types of materials used, and results. Whether a logbook or digital file, this provides for consistency and reference in future years.

Last update on 2026-05-18 / Affiliate links / Images from Amazon Product Advertising API

Repair Techniques for Common Shelter Damage

Temporary shelters in particular can experience a host of damage from the effects of nature, general deterioration, or abuse. Identifying the key problems and addressing them quickly helps ensure the shelter is safe and operational.

Here are some techniques and methods to repair common shelter damage appropriately and effectively.

Patch Holes and Tears

This is typical damage, particularly in tent-style shelters. To repair, use fabric patches or heavy-duty repair tape designed for outdoor use.

Clean the damaged area with soapy water to remove any debris, giving the adhesive a clean surface to adhere to.

Place your patch or piece of tape over the tear, then rub it down firmly to help it adhere. For larger holes, patch on both sides of the fabric, overlapping the patches as necessary. Keep an eye on the repaired area going forward, as continued use may require additional repair efforts.

Essential materials include adhesive patches, scissors, and cleaning wipes.

Reinforce Weakened Structures

Any affected frame or joint reduces the shelter’s stability. Look for areas of weakness, such as bent poles or drooping support structures. Then reinforce them with additional materials, such as thick branches or ropes.

Secure lash reinforcements with cord or zip ties to ensure they stay in place. For portable shelters, having duct tape on hand can go a long way to offer temporary support. Be sure to inspect reinforcements regularly so they remain effective over the long term.

Replace Damaged Components

When components such as poles or stakes break, replacements are usually the best course of action. Replacement materials should be compatible with the original components.

For example, aluminum poles are best for lightweight tents, but wooden poles are ideal for heavy-duty structures.

Follow a careful, step-by-step process to remove the damaged area and install the replacement securely and safely.

Address Water Leaks

Leaks often occur at seams or where two areas of a roof meet. Use seam sealant or waterproof fabric patches to seal the damaged source. Plastic sheeting or tarps can be used for larger leaks and as temporary measures.

Finish by pouring water over previously repaired areas to test effectiveness.

Weatherproofing and Insulation Techniques

Building a lasting weatherproof home starts with protecting it from the elements and maintaining a cozy atmosphere. Weatherproofing and insulation complement each other beautifully.

Both are intended to shield you and improve your comfort in extreme climates. This includes applying waterproofing, enhancing your insulation, and sealing any areas where water could get in.

Apply Waterproofing Agents

Fixing leaks is essential. Waterproofing is about protecting structures from the negative effects of rain and moisture.

Start by selecting agents appropriate to your shelter’s materials—silicone sprays for fabric tarps or bitumen-based sealants for wood.

Make sure you apply these coatings evenly, following the instructions printed on the product, to ensure the best possible results.

Reapply every 3-5 days, or after heavy rain or extended use, to ensure protection is always at its best.

A silicone-based water repellent works great on nylon tarps. In the other direction, linseed oil is the best treatment for any untreated wood. Recommended products: Scotchgard Heavy Duty Water Shield, AquaSeal Waterproof Spray, and Rust-Oleum Sealers.

Improve Insulation

Insulation helps to trap heat and make your home cozier. Begin by packing or layering non-burning materials that will decompose over time, such as moss, leaves, or evergreen boughs.

A debris mattress—minimum of 1 foot thick—makes excellent ground insulation.

Remember that leaves are going to compact a lot when you walk on them, so pile 3 feet at first. Tarps or blankets can be piled on top for even more protection. Keep an eye on your temperature.

Monitor your building’s temperature to assess its insulation, and make changes as necessary.

Seal Gaps and Cracks

Sealing reduces the risk of drafts and moisture intrusion. Find these cracks or gaps with a flashlight and your eyes, then fill them in with caulk, grout, or even modeling clay.

Consistent monitoring is essential to make sure these seals are not compromised over time. Appropriate materials might be silicone caulk, duct tape, or natural options like beeswax or resin.

Last update on 2026-05-18 / Affiliate links / Images from Amazon Product Advertising API

Tools and Materials for Shelter Repair

Achieving a reliable shelter means having the right tools and materials to make it last. Knowing what tools and materials to use and how to arrange them can help make repair tasks more efficient and effective.

Below, we dive into the nuts and bolts of repairing and maintaining a shelter.

Essential Repair Tools

Having the right tools on hand is a cornerstone of effective repairs. A knife is indispensable for cutting ropes or trimming materials, while a hammer—especially a wooden one—can help level ground or secure structural elements.

Multi-tools are compact and versatile, offering features like screwdrivers and pliers for various tasks. Precise damage assessment often requires measuring tools such as a tape measure or a ruler.

Safety gear, including gloves and goggles, protects you from injuries during work. For easy reference, include these in your toolkit: knife, hammer, wooden hoe, multi-tool, tape measure, gloves, goggles, and spare fasteners.

Repair Material Selection

Material selection will vary based on the type of shelter and the type of damage. When patching holes, flat leaves or tufts of grass are especially effective.

Sealants or adhesives must be weather-resistant and compatible with existing materials.

Ideally, these poles should be 8-10 feet long, as longer poles provide the best support for repairs. Latticework designs prevent up to 85% of debris from falling through.

Make durable material choices that will withstand environmental conditions.

Improvised Repair Solutions

When resources are limited, creativity is crucial. Plant fibers can be twisted into ropes, and dry debris provides insulation. For temporary repairs, it’s helpful to use natural resources such as sticks or rocks.

Everyday objects, such as duct tape or pieces of fabric, can also be used for temporary repairs. You can also use grass knots for bracing or leaves for waterproofing.

Safety Considerations

When constructing or retrofitting an animal shelter, take safety seriously. That decision will ensure the infrastructure is here for future generations and that their use is safe and sound.

By addressing potential risks and following safety precautions, we can build a safe and trustworthy environment.

Here are five critical areas to consider to ensure safety is prioritized during shelter development and maintenance.

Site Selection Safety

Development in the wrong place puts people at risk from natural hazards.

Evaluate the site for flood hazards, especially in flood-prone, poorly drained, or low-lying areas, or areas adjacent to bodies of water. Look for loose rocks or decayed tree limbs above that might fall.

Avoid routes marked by evidence of animal movement, such as trails or feces, to reduce the risk of wildlife interactions.

Dead trees or “widowmakers,” as well as uneven ground, are other hazards and should be steered clear of.

When selecting a site, consider these factors:

• Elevation to prevent flooding
• Stability of the ground
• Distance from wildlife trails
• Overhead and surrounding hazards

Structural Integrity

A safe, structurally sound shelter creates a barrier against collapse from above and against outside threats. Check the frame and foundation areas frequently for cracking or looseness.

Strengthen any loose connections with strong materials, such as dense wood timbers or metal braces.

Repair any damage found right away to avoid further deterioration.

A checklist for structural reviews should include:

• Examining support beams and connections
• Checking for water damage or rot
• Verifying roof stability

Fire Safety

Fire safety reduces the chances of unintentional fires. Maintain at least 10 feet of clearance between shelter and any open flame, heat source, or fire ring.

Choose fire-resistant materials, like treated wood or metal sheeting, when building walls or roofs.

Always keep a water bucket or fire extinguisher within reach.

Fire safety tips include:

• Maintaining safe fire distances
• Keeping flammable materials away
• Monitoring all fires closely

Environmental Awareness

Knowing the local conditions protects the shelter. Know local wildlife activity and use sustainable practices to gather materials.

Stay tuned to weather advisories, particularly during storm events or sustained high winds, which may require additional safety considerations.

Environmental considerations include:

• Recognizing wildlife activity
• Avoiding overharvesting resources
• Adapting to weather changes

Last update on 2026-05-18 / Affiliate links / Images from Amazon Product Advertising API

Sustainable Shelter Practices

Responsible, sustainable shelter construction is all about making mindful decisions to meet needs while minimizing environmental impacts.

By integrating renewable materials, reducing waste, and designing for durability, you can create structures that meet immediate needs while respecting long-term ecological goals.

Use Renewable Resources

This is where incorporating renewable materials becomes important. Wood from responsibly managed forests, as well as bamboo and cork, are super choices because they replenish naturally and are readily available.

Recycled materials, such as reclaimed wood or steel, further minimize the need for new materials. When choosing materials, plan for their entire lifecycle.

For example, adobe or rammed earth offers great durability, insulation, and a low environmental footprint. By supporting local suppliers and manufacturers, we’re not only cutting down on transportation emissions — we’re bolstering our community’s economies.

A basic checklist might involve using sustainable timber, insulation made with natural fibers, and plant-based sealants.

Minimize Environmental Impact

Waste reduction begins on the first day of construction with better planning and coordination. Modular designs reduce excess materials, and recycling scrap on-site keeps waste out of landfills.

Choosing sustainable materials — like clay bricks or straw bales— reduces the ecological footprint of your home.

Methods such as rainwater harvesting implemented during the construction phase help alleviate stress on resources, while the use of solar-powered tools further reduces emissions.

Whether it’s through a workshop or a written resource, educating others multiplies the impact by spreading awareness and adoption of these practices far and wide.

Three major strategies are reusing materials, composting organic waste, and incorporating energy-efficient building designs.

Design for Longevity

Durability means less need for ongoing repair. Utilize weather-resistant materials, such as treated wood or non-corrosive metal alloys, and ensure structural integrity to endure environmental wear and tear on elements.

Routine inspections allow you to catch problems before they develop into larger and more costly repairs. Consider future climate impacts, such as increased frequency of severe storms and higher temperatures.

Include flexible elements, like raised bases and sun-blocking roofing patterns. Longevity-focused features like sloped roofs that allow rain to run off and designs that ventilate the inside out help control moisture.

Last update on 2026-05-18 / Affiliate links / Images from Amazon Product Advertising API

Our Conclusion

Constructing or mending a shelter requires ingenuity, foresight, and physical labor. Each one gets you a little bit closer to building a safe, solid shelter.

Whether you’re just getting things moving or you’re building on what you’ve accomplished, the momentum is real.

Selecting the best materials, employing simple yet effective methods, and maintaining a focus on safety can go a long way. From lean-tos to debris huts or snow shelters, each project hones new skills you can carry with you back home.

Repairing damage or installing new insulation helps maintain a functional structure prepared for whatever weather comes.

Remember to build on what already exists and be green when you can. Now it’s up to you—get your tools, choose your site, and get to building.

That effort is always worthwhile if it results in a practical, well-made shelter.

Frequently Asked Questions

What are the basic materials needed to build a shelter?

Common materials used in debris shelter construction can include strong branches, tarps, rope, leaves, and rocks. These serve as a building, an animal shelter, and a source of winter warmth. Gathering easily accessible resources can lead to the fastest and most effective shelters.

How do I build a lean-to shelter?

Support a long branch between two strong stands. Lean increasingly smaller branches against it, creating a slanted roof. To weatherproof, cover it with leaves or a tarp.

What’s the best way to repair a damaged shelter?

Begin with a damage analysis. Replace broken sections, patch holes, and reinforce vulnerable areas with ropes, duct tape, or other limbs.

How can I weatherproof a shelter?

If you can, use waterproof materials such as tarps or plastic sheeting. Fill gaps with leaves, moss, or forest debris to insulate the shelter and prevent wind/rain from entering.

What tools are essential for shelter repair?

Basic tools: a knife, a hatchet, a rope, duct tape, and a multi-tool. These assist with preparing, fastening, and strengthening fabrications.

How do I construct an emergency snow shelter?

Pack the snow to form a firm and smooth mound. For added warmth, dig out an interior space to pack with insulating materials. A small, controlled entrance and ventilation hole are extremely important to safely utilize this shelter.

What are sustainable shelter-building practices?

Use natural materials that are locally available, such as fallen branches or leaves. To minimize environmental harm, do not cut down living trees or remove wildlife nesting areas.