Match choices (1—4) to (A—D) and write sentences as in the example, using Conditional II constructions. Make up one sentence with your own ideas.
1) people recycle more paper A) they/not/be dirty
2) factories stop pouring chemicals into rivers B ) it/help the environment
3) people/not leave rubbish in parks C) they/be less polluted
4) people stop using aerosols D) logging companies cut fewer trees
Example:
If people recycled more paper, logging companies would cut fewer trees.