On global warming

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Abstract

The ongoing debate about global warming prompted me to have a look at the physics myself, and see if I could make some sense of it. I have to say that I came to this rather as a sceptic because I do not believe that it is feasible to model the climate of the planet with any degree of confidence. The number of relevant variables is just too great. It is well-known that the weather is a chaotic phenomenon, and a look at the temperature variations indicates that the yearly trend is equally random. On the other hand, NASA’s chart of the world average temperatures does show an undeniably upward trend over the last 130 years.