英文句子One of the main themes of Planet Under Pressure is the w

英文句子
One of the main themes of Planet Under Pressure is the way many of the Earth's environmental crises reinforce one another.
Pollution is an obvious example - we do not have the option of growing food,or finding enough water,on a squeaky-clean planet,but on one increasingly tarnished and trashed by the way we have used it so far.