It’s our duty to protect and beautify our environment.
2.Our earth is suffering severe/serious/bad damage， we should take practical measures to protect it.
3.Only by reducing air pollution can we have fresh and clean air.
There’s no doubt that……
2. lead to （doing）
3. make a conscious effort to do
4. be devoted to （doing）
5. be harmful to
1. There’s no doubt that many cities’ air condition is in trouble.
2. Fresh air is so heavily polluted by factory waste gas that it is no longer to breathe.
3. There is a lot we can all do， however， to reduce air pollution.
4. We should make a conscious effort to avoid private cars which produce carbon dioxide.
There’s no doubt that many cities’ air condition is in trouble， causing numerous people to suffer a lot. As we know， fresh air is so heavily polluted by industrial waste. Therefore， people’s health is in great danger because of the severe smog.
There’s a lot we can all do， however， to help prevent this. On the one hand， local governments are supposed to organize instant investigations to find out where the poisonous smog comes from. On the other hand， we should make a conscious effort to avoid private cars which produce carbon dioxide.
May we have a greener and cleaner world!
May you have a fabulous performance in 43 days and a bright future! Good luck to you!!!