Across
- 3. Used to keep pests away
- 5. When we do not take care of our water, they get _____
- 6. This forms a layer on the surface of water
- 7. Aquatic plants need this to make food
Down
- 1. Litter causes health problems to them
- 2. We should throw our rubbish here
- 4. A common polluted area near water
- 5. A common type of litter found in the ocean