Dirty air, water, or land by harmful substances, Process used materials so they can be used again, When large areas of trees are cut down, often destroying animal habitats., The variety of living things in an area., Using resources in a way that does not harm the environment., Protecting nature and wildlife., Energy that comes from the sun, wind, or water., Animals that are at serious risk of disappearing forever., The amount of CO₂ produced by a person or activity, The natural environment where a plant or animal normally lives and grows..

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