How to protect the environment?, save water, save electricity, recycle, use renewable sources of energy, sort out rubbish, use public transport, walk instead of driving, environmental problems, global warming, climate change, greenhouse effect, air pollution, water contamination, deforestation, endangered species, natural disasters, flood, earthquake, tsunami, volcanic eruption, hurricane, avalanche, firest fires/wild fires, natural places, mountains, river, valley, peninsula, island, lake, waterfall.

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