The energy driving our climate comes from the sun. But what does happen to this energy when it passes the atmosphere. What happens when light falls on clouds, when it reaches the Earth surface? Not only the sun sends light to the Earth. The Earth warms and sends radiation back. Also this radiation does not directly go back to the space. There are greenhouse gases and clouds in between. In the first part of this Unit we will see how the energy supply of our planet works and learn about the greenhouse effect.
In a second part we will learn about what plants emit to the atmosphere, either during their life or if they are consumed in vegetation fires.
Without the greenhouse effect,life
wouldn't be possible on Earth.