Anything with an oxidative metabolism will exhale CO2. The rise in human
population hasn't been that extreme between 1750-1900. But it went up very
quickly from 1950 onwards. See the following link:

http://www.prb.org/Content/Navigatio...ion_Growth.htm

Regards

John Barnard

WShoots1 wrote:

However, the quantities of CO2 have increased dramatically over the last
100-150 years.

Probably due to the increase in human population. After all, we exhale CO2.

Bill, K5BY