Which one of the following is a source of carbon dioxide in the troposphere?

Name: Which one of the following is a source of carbon dioxide in the troposphere?
Brand: Quizplus
Rating: 4.8 (48 reviews)

Question

Quizplus · Accepted Answer

Fossil-fuel combustion is the primary human-caused source of carbon dioxide emissions in the troposphere. Electrical discharges, natural gas seepage, forest fires, and volcanic gases may contribute to carbon dioxide emissions but are not significant human-caused sources.

Which One of the Following Is a Source of Carbon