12. Agricultural runoff can be best described as...(1 point)
Responses
A. the total amount of water used to irrigate crops across the planet
B. the rainwater harvested for the purpose of crop irrigation
C. the water that leaves crop fields and often carries pollutants into fresh water sources
D. the water that never reaches the roots of the crops in a field
C. the water that leaves crop fields and often carries pollutants into fresh water sources
13. Why is rainwater harvesting important in sustainable farming practices? (Choose 2)(1 point)
Responses
A. It reduces the demand for using groundwater for irrigation
B. Allows farms to add pesticides before using
C. Allows water to be stored for future use
D. Allows water to be sanitized before applying to crops
A. It reduces the demand for using groundwater for irrigation
C. Allows water to be stored for future use
14. Although about 70% of earth's surface is covered in water, about how much of that water is freshwater?
A. 2.5%
B. 71%
C. 1.2%
D. 30.1%
A. 2.5%
15. The human race is using the freshwater from our groundwater aquifers faster than it can be replaced. This overuse can result in the following:
A. the water table being lowered
B. the ground sinking
C. salt water mixing into our freshwater supply
D. all of the above are impacts