Over the last century and a half, the main source of increased atmospheric carbon dioxide has been ________.
A) volcanoes
B) photosynthesis
C) photoperiodism
D) rock decomposition
E) burning of fossil fuels

Question

Quizplus · Accepted Answer

The burning of fossil fuels, such as coal, oil, and gas, for energy and transportation has released large amounts of carbon dioxide into the atmosphere, making it the main source of increased atmospheric carbon dioxide over the last century and a half.

Over the Last Century and a Half, the Main Source