Pollution, Dirtying the environment, Deforestation, Cutting down forests, Global warming, Increase in Earth’s temperature, Endangered species, Animals or plants at risk of extinction, Waste, Garbage or trash, Renewable energy, Energy from sources that don’t run out, Climate change, Long-term changes in weather patterns, Conservation, Protection of natural resources, Fossil fuels, Fuels like coal, oil, and gas, Recycling, Reusing materials.

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