Which of the following is the most significant single contributor to the increase in the amount of carbon dioxide in Earth's atmosphere over the past 170 years?
A) increased worldwide primary production
B) an increase in the amount of infrared radiation absorbed by the atmosphere
C) the burning of fossil fuels
D) additional respiration by the rapidly growing human population

Question

Quizplus · Accepted Answer

The burning of fossil fuels is the most significant single contributor to the increase in the amount of carbon dioxide in Earth's atmosphere over the past 170 years, primarily due to the release of CO2 when coal, oil, and natural gas are burned for energy.

Which of the Following Is the Most Significant Single Contributor