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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