In this short article, professor emeritus Howard Hayden answers some basic questions on infrared radiation and its importance for the understanding of the climate on Earth.

How Much CO 2 and the Sun Contribute to Global Warming:
Author Hermann Harde, Helmut-Schmidt-University, Holstenhofweg 85, 22043 Hamburg, Germany Summary The Intergovernmental Panel on Climate Change assigns the human influence on our climate with very