V.
1. If the Earth gets warmer, the sea will get warmer
2. If the ice at the North and South Poles melts, the sea level will rise
3. If there are floods in many parts of the world , many people will lose their homes
VI .
1. If a person looks at the sky at night, he won not be able to see the Milky Way by naked eye.
2.If Noise pollution happens regularly, it will cause stress or nuisance.
3. If water pollution gets more serious in the future, it will affect the development of economy and society.
4. If Australia has invested in water in Vietnam with good results, half of the population in the rural areas will have access to fresh water
5. If you use compact light bulbs, you will save a lot of energy.
6. We will have more space If we plant more trees.