Question

Many different processes, both natural and human-caused, can release carbon dioxide into the atmosphere. Which of the following processes can occur naturally and adds carbon dioxide to the atmosphere?
A.
the burning of petroleum in an automobile
B.
the burning of plant life in a forest fire
C.
the burning of coal in a coal-fired power plant
D.
the burning of natural gas on a stove

Answer 1

The process that can occur naturally and adds carbon dioxide to the atmosphere is:

**B. the burning of plant life in a forest fire**

Forest fires are natural events that can release carbon dioxide as plants and trees burn. In contrast, options A, C, and D involve human activities that result in the combustion of fossil fuels, which is not a natural process.