A student has sent me five questions on the issue of man-made
climate change. As they may be seen as typical, I answer them
here on the Klimazwiebel. This may be useful – for the student,
who will be able to read the comments of the readers of the
blog, – for the bloggers to better understand the issues and
concerns among lay people, – for me, who will have a critical
assessment of my response to the student. The idea with this
post is that the student will read it plus the comments - so
that the different contributions should not represent too much
piecework. Therefore, commenters, deal just with the questions
raised, and try to make only one statement so that the material,
which eventually gathers, is compact! 1. Human activities
contribute to global warming – Yes, the major human influence on
global warming is through the emission of so-called greenhouse
gases (GHGs), in particular carbon dioxide, which accumulate in
the atmosphere und remain there for several decades. The air
temperature (near Earth surfa