Global warming (sun heating), , Acid rain, , Pollution, , Solar power (like solar panels), , Ozone layer, , Natural resources, , Ecological/ Eco-friendly/ Green, , Endangered species, , Fumes, , Wildlife, , Deforestation, , Fossil fuels, , Greenhouse effect, , Litter/ Rubbish, , Overpopulation, , Melting ice caps, , Renewable energy, , Climate change, , Rising sea levels, , Cut down on plastic bags, .

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