Based on the above graph, the concentration of Carbon Dioxide in our atmosphere began to increase exponentially around 1860. Today, CO2 is at the highest concentration is has ever been. What do scientists attribute this exponential increase around the 1860s to?

Glaciers melting and causing ocean acidification
Combustion of fossil fuels by humans
Increased agriculture and farm animal reproduction
Deforestation by humans Deforestation by humans

The correct answer is the combustion of fossil fuels by humans. The exponential increase in carbon dioxide concentration around the 1860s is primarily attributed to the Industrial Revolution and the subsequent burning of coal, oil, and gas for energy and transportation purposes. This release of carbon dioxide into the atmosphere from the combustion of fossil fuels is a significant contributor to the enhanced greenhouse effect and global warming.