Events or situation that are generally true. : If we want to save the Earth, we need to take action right now. , If we recycle plastic, we help the environment. , The air is not polluted if we preserve our natural places. , Present and future possibility : If Earth's temperature gets warmer, the ice will evaporate., A lot of animals will die if we do not stop climate change. , If we don't protect our natural resources, we'll run out of them. ,

Zero or first conditional?

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