1) if the land is polluted , the farmers will be unable to grow crops 

2) there won't be visual pollution if people don't build too many telephone piles and overhead power lines

3) if people use contaminated water for cooking , their health will be badly affected

4) if we place dustbins in many places , people won't throw rubbish everywhere

5) the industrial waste will be well-treated if the factory install a new filtration system

6) if you don't stop swimming in that lake , you will have skin rashes

7) if noise pollution happens regularly, it will cause stress or nuisance

8) if a person looks at the sky at night , he will not able to see the Milky Way by naked eye

9) if you use compact light bulbs , you will save a lot of energy 

10) if we have more space , we will plant more trees

1. If i have enough money, i will buy that book

2. If the weather is fine tomorrow, i will go camping

3. If tomorrow is hot, i will go swimming

4. If i study hard, i will get good marks

5. If she tries her best, she can do it

6. If we drink too much cold water, we will have a stomachache

7. If you have a tootache, you should go to the dentist

8. If he studies well, he will be allowed to go out with friends

9. If they don't watch that film, they will be disappointed

10. If we don't protect the enviroment, it will be more polluted