If we had had known about the effects of global warming, we would have acted sooner.
The ice caps wouldn't have started to melt if people had protected the environment.
The city wouldn't have flooded if it hadn't rained so much.
Would the situation have gotten so bad if people had installed solar panels in their houses?
Temperatures wouldn't have risen if we had controlled the effects of climate change.
Would people have realised the extent of the problem if we hadn't organized the demonstration?
Ответ: смотри решение в блоке answer