Approximately 60 percent of Earth's ecosystem services are currently being degraded or are being used unsustainably.One ecosystem service that is probably not degrading, at least at present, is
A) agricultural soils.
B) atmospheric oxygen supply from photosynthesis.
C) the regulation of flooding.
D) the availability of clean water.
E) the ability to control pollution.

Question

Quizplus · Accepted Answer

The atmospheric oxygen supply from photosynthesis is not degrading since it is a natural process that has been occurring for millions of years and is not being affected by human activities. Plants release oxygen into the atmosphere as a byproduct of photosynthesis, which is then used by animals, including humans, for respiration.

Approximately 60 Percent of Earth's Ecosystem Services Are Currently Being