Across
- 2. __________% of water is used for irrigation and producing food.
- 4. plants cannot grow in __________ water.
- 5. Humans can only survive three to four days without water, unlike __________.
Down
- 1. Water occupies approximately __________% of our planet's surface.
- 3. Water is essential for animals and plants, and some trees can use up to 20 __________ liters of water.