水土流失与我国北方大规模荒漠化问题及城市的环境破坏与污染控制问题等等。

Some other problems such as soil and water loss, the large-scale desert belt in north, environmental destruction and pollution control in city, and so on.

youdao

水土流失与我国北方大规模荒漠化问题及城市的环境破坏与污染控制问题等等。

Some other problems such as soil and water loss, the large-scale desert belt in north, environmental destruction and pollution control in city, and so on.

youdao