The infrared in the atmosphere is emitted by the gas molecules that compose it, not by the atoms on the Earth's surface. Author; Rogelio Pérez C Abstract Climate change can be summarized as the increase in heat on the planet, which is measured by knowing the air temperature; this work makes a difference between heat and temperature.in relation to the temperature of the atmosphere we can say that we can see and measure it, due to the infrared light emitted by the molecules of the air, due to its kinetic movements, but the heat we cannot see, because it only exists when molecules of different systems interact at different speeds or temperatures, in other words heat is a collision between molecules of different systems, and depends on the number of molecules, and the speed of these, for example, heat transferred by molecules in an atmosphere layer with 1% air at 15°C, and heat transferred by molecules in an atmosphere layer with 75% air at 15°C are different. What is ...