1. D (Option C is not the correct answer, as indicated by the modal verb “may” in both paragraph 1 and in the heading).
5. fuel mix/transport/waste reduction (any 1)
8.(i) They get into waterways and contaminate the marine food chain.
(ii) They are swallowed by fish and other seafood, which we eat.
9. They have phased them out/eliminated them/banned their import. (any 1)