WATER

1. 5

2. What I know

2.1. water is costly

2.2. water is renewable

2.3. water is precious

2.4. water can be drink

2.5. there are 78% of water

2.6. is a home for marine animal

3. What I want to know

3.1. if water is renewable where we need to save it

3.2. how we remove salt from seawater

3.3. how water is created

3.4. why everything we use need water

3.5. how pollution affect water

3.6. how we save water