What is the major source of carbon dioxide?
A) aerosol sprays and refrigerants
B) by-product of cattle and sheep digestion
C) burning fossil fuels
D) widespread use of chemical fertilizers in agriculture
E) burning associated with rainforest clearing

Question

Quizplus · Accepted Answer

The burning of fossil fuels such as coal, oil, and natural gas is the largest source of carbon dioxide emissions, accounting for about 80% of all human-caused carbon dioxide emissions globally.

What Is the Major Source of Carbon Dioxide