Question

A graph of atmospheric carbon dioxide concentration over time is shown. Scientists are investigating the cause of the large increase in atmospheric carbon dioxide concentration since about 1800. Which of the following provides the best explanation for the increase of carbon in our atmosphere?

A. Frequent eruptions of large volcanoes.
B. Naturally occurring fluctuations of in the carbon cycle.
C. Utilization of fossil fuels by humans for industrialization.
D. An increase in the sea level due to melting of ice.​

Answer 1

C. Utilization of fossil fuels by humans for industrialization.

Step-by-step explanation:

Frequent eruptions of large volcanoes were happening long before humans and will happen after humans too. They are not the reason why we are seeing so much CO2 in the last 200 years.

There are some naturally occurring fluctuations of carbon but not to the degree that we are seeing.

Melting of ice and sea levels rising is due to the global warming problem caused by our dependency on fossil fuels.