CO2 is made up of one carbon atom and two oxygen atoms. Its history dates back as far as that of the solar system. After the death of an ancient supernova, a cloud of particles produced by the explosion began to condense. As these particles got closer, they compressed and heated up until the central part switched on. The Sun was born and the asteroids, planets and the Earth began to form. Small parts of the carbon that remained trapped between its rocks were heated, erupting from volcanoes in the form of CO2. And thanks to this, the heat from the sun and the earth's core made this environment warmer and more hospitable.