We can tear apart the great grass cover of the western plains and pour toxic chemicals into the soil until the soil is dead and blows away in the wind.
我们可以把西部平原上覆盖的大片草地撕开，然后把有毒的化学物质倒入土壤中，直到土壤枯死，被风吹走。
2
There are bacteria that help plants grow,others that get rid of dead animals and plants by making them decay,and some that live in soil and make it better for growing crops.