Water

1. life

1.1. plants

1.2. animals

1.3. people

2. birds

2.1. waders

2.2. gulls

2.3. albatross

3. rivers

3.1. shannon

3.2. Nile

4. conservation

4.1. waste

4.2. pollution

4.3. no new water

5. cycle

5.1. evaporation

5.2. condensation

5.3. water vapour