Water quality is a measure of the health of water supplies used for drinking and other important activities. Which human activity MOST directly affects water quality?

-powering homes

-fertilizing crops

-driving cars

-fishing

Long term exposure to waves can cause sunburns and skin cancer.

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water.b. they use chlorophyll and oxygen to make carbon dioxide and water.c. they use sunlight, water, and carbon dioxide to make sugars.d. they use sunlight, water, and oxygen to make chlorophyll.