大學(xué)英語作文：Protection of the Environment保護環(huán)境
Once man did not have to think about the protection of his environment.There were few people on the earth, and natural resources seemed to be unlimited.
過去，人們不必擔(dān)心保護環(huán)境的問題。因為那時地球上人口稀少，自然資源似乎取之不盡。
