text: 1. Convection accounts for approximately 67% of the total amount of heat transfer from the Earth's surface to the troposphere, the condensation of water vapour for 25% and radiation accounts for only 8%. As the heat transfer in the troposphere occurs mostly by convection, accumulation of CO2 in the troposphere intensifies the convective process of heat and mass transfer, because of the intense absorption of infrared radiation, and leads to subsequent cooling and not warming as commonly believed.