Stephen Rees's blog

BBC News| Science

It was 50 years ago that a young American scientist, Charles David Keeling, began tracking CO2 in the Earth’s atmosphere at two of the world’s last wildernesses – the South Pole and the summit of the Mauna Loa volcano in Hawaii.
His very precise measurements produced a remarkable data set, which first sounded alarm bells over the build-up of the gas in the atmosphere, and eventually led to the tracking of greenhouse gases worldwide.

I am not sure but I would bet that the deniers promptly started their very unscientific campaign to throw doubt on the data. And especially the linkage between burning coal and oil and the change in our climate. In fact “climate change” itself was a response to the sand thrown in peoples’ eyes by the use of the term “global warming” since in some places more severe winters began to be experienced from the same cause