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 . . .
TERMITE GAS EXCEEDS SMOKESTACK POLLUTION
SOURCED ARTICLE FROM NEW YORK TIMES
TERMITE MOUNDS BREATH CO2
TERMITE MOUNDS 17 feet tall