Signal wrote:

The programme failed to point out that scientists had now explained
the period of "global cooling" between 1940 and 1970. It was caused by
industrial emissions of sulphate pollutants, which tend to reflect
sunlight. Subsequent clean-air laws have cleared up some of this
pollution, revealing the true scale of global warming - a point that
the film failed to mention.


Well there's the answer to global warming then.


--
Brian Wakem
Email: http://homepage.ntlworld.com/b.wakem/myemail.png