This paper analyses the potential impact of anthropogenic heat on the global rise in tropospheric air temperature. A significant part of primary energy consumption is converted into heat and, in addition, to solar energy absorbed by the Earth’s atmosphere. We can expect that the increase in energy consumption will significantly impact future climate. The role of energy loss due to irreversibility in any actual process is proposed to analyze global warming through the concept of entropy generation. An increase in entropy always leads to higher energy consumption.