⓵ 주제문 -> There is a no doubt that mankind has come up with some great inventions and advancements
that have made our lives more convenient.
⓶ 뒷받침 문장 1 -> To begin with, the atmosphere of the Earth has been severely damaged because of
the activities of mankind.
⓷ 뒷받침 문장 2 -> Another terrible side effect of human activity involves the forests.
Forests around the world have been decimated by the civilization of human society.
⓸ 마무리 문장 -> To sum up, the development of human society has given us great benefits and conveniences,
but in the long run we are harming ourselves and are not thinking about the future.