If scientists ______ cures for most diseases, people _____ much longer., If scientists find cures for most diseases, people will live much longer., If the climate ______ warmer, sea levels ______., If the climate gets warmer, sea levels will rise., Many endangered species ______ if we don’t ______ them., Many endangered species will die out if we don’t protect them., We ______ stop climate change if we _______ less fossil fuels., We won't be able to stop climate change if we don’t use less fossil fuels., If we ______ the rainforests, there _____ more carbon dioxide in the atmosphere., If we cut down the rainforests, there will be more carbon dioxide in the atmosphere., If we ______ nuclear weapons, I think the world ______ a much safer place., If we get rid of nuclear weapons, I think the world will be a much safer place..

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