Please explain

Sir: The crux of manmade CO2 causing climate change rests on being able to explain the thermodynamics of how 0.384% of CO2 can change the temperature of the earth, so can someone ‘please explain’ the thermodynamic function.

During the Federation Drought of 1895 – 1903 nearly half the nation’s livestock died, Australia experienced 27 drought years between 1788 and 1860, and at least 10 major droughts between 1860 and 2000.