Используя conditional ii или iii if we (throw away) less rubbish our planet would be cleaner/ if ) you, i would join greenpeace

Question

Английский язык: Используя conditional ii или iii if we (throw away) less rubbish our planet would be cleaner/ if ) you, i would join greenpeace if you had read these books you (know) more about enviromental problems. if people (avoid) damaging nature many species of animals wouldnt have disappeared !