Across
- 2. Waste water from factories and farms contains harmful ________
- 4. ________ pass into the water by toilet waste.
- 6. Waste water goes away from settlements through _______.
- 7. Farmers use ______ on their crops.
- 8. Dirty water is _________ to drink.
- 10. Farmers also spray crops with chemicals to kill certain ______.
- 11. When we clean water to make it safe to drink.
Down
- 1. ___________ washes into storm-water drains and then into the river.
- 3. When dirty water arrives at a ________, it is cleaned.
- 5. Some household chemicals are unsuitable for flushing down the _____
- 6. ____________ means anything that damages the environment.
- 9. Waste water from toilets
