It is generally believed that climate change is caused by human activities .
举一反三
- Climate change is caused by planting trees and protecting animals.
- Global warming is caused by human activities except the greenhouse effect.（ ）
- It is generally believed that the (increase) __________ air pollution has caused serious problems such as global warming.
- Global climate change mainly refers to global warming caused by the increase of ( ). A: Harmful gases B: Noble gases C: greenhouse gases D: Air pollutants
- It is generally believed that teaching is _____it is a science.