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Climatic changes may do a lot of harm to our planet and those who populate it.(Изменение климата могут нанести много ущерба нашей планете и тем,кто на ней живёт)

May climatic changes do a lot of harm to our planet and those who populate it?

Climatic changes may do a lot of harm to our planet and those who populate it, mayn’t they?

What may do a lot of harm to our planet and those who populate it?

May climatic changes do a lot of harm to our planet or land and those who populate it?

Whom climatic changes may do a lot of harm?