The primary source for the rising carbon dioxide levels is respiration of the Earth's growing population.

Question

Quizplus · Accepted Answer

The primary source for the rising carbon dioxide levels is the burning of fossil fuels such as coal, oil, and gas for energy, as well as deforestation and other land-use changes. While respiration by the Earth's growing population does contribute to carbon dioxide emissions, it is not the primary source.

The Primary Source for the Rising Carbon Dioxide Levels Is