1. If we drop litter on the beach, we can see it on another beach
2. Unless we protect the forests, there won't be enough oxygen.
3. Unless we protect endangered species, most of them will become extinct
4. If we destroy ozone layer, nothing will save us from ultra-violet rays
5. What will happen to the Earth if the global temperature rises?
6. Daisy will buy a new dress if she has enough money
7. If the sea gets warmer, the ice at South Pole will melt
8. If the weather is fine, we will go for a picnic
9. Nobody will like you if you don't change your behaviour
10. The ice caps will melt if we don't take care of our planet
