Question

Which provides evidence that humans are causing an increase in the carbon dioxide concentration in the atmosphere?

A. The net flux of carbon into the atmosphere without including the contribution from burning fossil fuels is positive.

B. The net flux of carbon out of the atmosphere without including the contribution from burning fossil fuels is zero.

C. The net flux of carbon into the atmosphere without including the contribution from burning fossil fuels is negative.

D. The net flux of carbon out of the atmosphere without including the contribution from burning fossil fuels is negative.

Answer 1

C

Step-by-step explanation:

earth science climate change unit test

Answer 2

Answer: The net flux of carbon into the atmosphere without including the contribution from burning fossil fuels is positive.

Step-by-step explanation:

The human activity of burning fossil fuels inevitably contributes to the increase in carbon dioxide and other gases in the Earth's atmosphere. As a result of this occurrence, a natural greenhouse appears. The greenhouse effect is the process of warming the Earth's surface and the lower layers of the atmosphere, resulting from the leakage of heat radiation.