The temperature originates only from the kinetic energy, from the gas molecules in the atmosphere. Author; Rogelio Pérez C Summary; Temperature is defined by physics, as a measure of the average speed at which atoms and molecules move in systems. This work will therefore explain the temperature, pressure, kinetic energy and the speed at which molecules move in gases known as the atmospheres on three planets of the solar system, based on the kinetic theory of gases, I will show through the mathematical formulas of kinetic energy, that temperature, and pressure is proportional to the average energy of gas molecules in the atmospheres on planets, earth, Venus and mars. That's why it's false that the heat on the planet correlates with as few molecules in the atmosphere, like CO2, which are only 0.04% of the total molecules in it. Therefore, the explanation of global warming must consider kinetic energy, in order to understand how heat affects, not only on planet earth, b...