I. Make up the questions:

1. types/of/problems/What/ecological problems /we/do/have?
2. are/seas/Why/the/danger/in?
3. “greenhouse effect”/does/the/What/mean/word?

1. What types of ecological problems we have? (грамматически должно быть так, там случайно второе problems не лишнее?)

2. Why the seas are in danger?

3. What does mean the word "greenhouse effect"?