Pollution, Dirty air, water, or land that harms the environment., Recycling, Changing used materials into new products, Deforestation, Cutting down many trees in forests., Climate change, Long-term changes in the Earth's weather., Global warming, The increase in the Earth's temperature., Drought, A long time with little or no rain., Flood, Water covering land that is usually dry., Endangered species, Animals or plants that may disappear forever., Renewable energy, Energy from natural sources like the sun or wind., Waste, Unwanted materials that are thrown away.

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