If we _______ (not separate) trash there, there ______ (be) mountains of garbage., If people _____ (use) a bike to transport, we ________ (not pollute) our world., If we ______ (not take) care of environment, it _______ (become) a very serious problem., If Mike _______ (teach) his child how to recycle, he ______ (do) it every day. , If Carlos ______ (not stop) throwing garbage in the river, the river ______ (be) very polluted., We ______ (not have) clean and fresh air if we ______ (not stop) cutting trees down., If everybody _____ (plant) a tree, we _____ (help) nature and ourselves to have a better world., If we _____ (use) energy saving bulbs instead of the normal ones, we ______ (save) a lot of energy., We _____ (not pollute) Earth if every single person _______ (use) only rechargeable batteries instead of the traditional ones.,

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