Is the Earth is warming? Facts are facts: the answer clearly must be absolutely ‘Yes’ and apparently, ‘Not,’ right?
It is trivially true that the Earth has warmed over the last 20 thousand and also over the last 150 years. An alternative viewpoint is that the Earth has cooled over the last 10 thousand years; it all depends upon the length of your piece of string. But most importantly of all, and over the time scale that counts for testing the hypothesis of dangerous global warming, since 1998 the Earth has failed to warm at all despite an increase in atmospheric carbon dioxide of more than 5 per cent. ~Bob Carter, 23-Nov-2010