Our world is warming rapidly. This is caused by the so-called greenhouse effect. The sun warms our earth and the earth in her turn (which means the crust, oceans, clouds, plants, in short our whole eco-system) reflects parts of this radiation. Now, because of the great amounts of CO2 in the air, the solar radiation can’t be ‘sent’ out of the atmosphere. The CO2 prevents it from reflecting, and this causes global warming. People are working on solutions to reduce the emission of CO2, while others are engineering solutions to stop the global warming as it is today.