If governments __________ (introduce) green taxes, emissions __________ (decrease)., had introduce/ would have decrease, introduce/ will decrease, introduced/ would decrease, If I __________ (be) in your shoes, I __________ (stop) buying plastic bottles., had been, would stop, was, would stop, were, would stop, If factories __________ (not give off) toxic smoke, cities would be cleaner., didn’t give off, would be, don’t give off, will be, didn’t give off, would have been, If he __________ (turn off) water while brushing teeth, he __________ (save) litres daily., turns off, will save, turned off, would save, had turned off, would have save, If countries __________ (switch to) renewable energy earlier, global warming __________ (slow down)., had switched to, will slow down, switched to, would have slowed down, had switched to, would have slowed down, If she __________ (have) more ecological education, she would recycle., had had more, would have recycled, had more, would recycle, has more, will recycle, If people __________ (not throw away) plastic, oceans __________ (not be) so polluted now., hadn't thrown away, wouldn’t be, didn’t throw away, wouldn’t be, don’t throw away, won't be, If they __________ (start) recycling programmes in 1990, landfill size __________ (have) decreased., had started, would have decreased, started, would have decreased, had been started, would have decreased, If I __________ (know) about climate strikes, I __________ (join) them., know, will join, knew, would join, had known, would have joined, If we __________ (run out of) clean water, life in big cities __________ (become) difficult., run out of, will become, ran out of, would become, had run out of, would have become.

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