The Sun, tilt of the planet, geologic activity and Termites change the climate more than Man.

Source: Termites: A Potentially Large Source of Atmospheric Methane, Carbon Dioxide, and Molecular Hydrogen (Science Mag)

By History Infographics — Extensive other sources . . .

SOURCES

TERMITE GAS EXCEEDS SMOKESTACK POLLUTION
https://www.nytimes.com/1982/10/31/us/termite-gas-exceeds-smokestack-pollution.html

SOURCED ARTICLE FROM NEW YORK TIMES
https://science.sciencemag.org/content/218/4572/563.article-info

TERMITE MOUNDS BREATH CO2
https://www.sciencemag.org/news/2015/08/how-termite-mounds-breathe

TERMITE MOUNDS 17 feet tall
https://news.nationalgeographic.com/news/2014/07/140731-termites-mounds-insects-entomology-science/