Question

Phosphorus in water runoff is contaminating a lake near a town. Phosphorus is a common ingredient in fertilizers. High levels of phosphorus
can cause algal blooms in fresh water.
Which two actions will best address the problem of excess phosphorus in runoff while minimizing additional environmental impacts?
A. Redirect rivers away from the lake.
B. Plant cover crops next to farmland and rivers.
C. Build coverings above farmland that block rainfall.
D. Build concrete channels for water between farmland and the lake.
E. Continually test soil nutrient levels and add only the needed amounts.
(pick 2 that best)

Answer 1

The two actions that will best address the problem of excess phosphorus in runoff while minimizing additional environmental impacts are:

B. Plant cover crops next to farmland and rivers.
E. Continually test soil nutrient levels and add only the needed amounts.

Planting cover crops can help reduce runoff by improving soil structure and minimizing erosion, while continually testing soil nutrient levels ensures that fertilizers are applied only as needed, reducing the risk of excess phosphorus entering waterways.