The increase in greenhouse gases during the last 130 years is primarily a result of ________.
A) the excessive burning of fossil fuels by humans.
B) the escape of these gases from plate boundaries and volcanoes.
C) increased sunspot activity that accelerates plant photosynthesis rates.
D) the release of excessive amounts of carbon from the oceans.
E) widespread use of chemical fertilizers in agriculture.

Question

Quizplus · Accepted Answer

Fossil fuels, such as coal, oil, and natural gas, are rich in carbon and release greenhouse gases (such as carbon dioxide, methane, and nitrous oxide) when burned. The burning of fossil fuels is the primary reason for the increase in greenhouse gases over the last 130 years.

The Increase in Greenhouse Gases During the Last 130 Years