1. In short, all types of pollution are increasing.
2. So, in conclusion, we can say that ...
3. Personally, I feel that there is a limit to what we can do.
4. I think there will be very few wild animals left in 25 years' time.
5. I hope people will work hard to protect our beautiful planet.
6. Governments should use the law, education and clean energy to improve the situation.
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