ExxonMobil has replied to the Royal Society by accusing it of "inaccurately and unfairly" depicting the world's largest oil company as a climate change sceptic:
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http://environment.guardian.co.uk/climatechange/story/0,,1878449,00.html
Personally, I trust the Royal Society ahead of ExxonMobil, just as I trust doctors advice ahead of tobacco companies.
The Royal Society's list of past-presidents:
* Sir Christopher Wren (1680-1682)
* Samuel Pepys (1684-1686)
* Charles Montagu (1695-1698)
* The Lord Somers (1698-1703)
* Sir Isaac Newton (1703-1727)
* Joseph Banks (1778-1820)
* Sir Humphry Davy (1820-1827)
* The Duke of Sussex (1830-1838)
* The Earl of Rosse (1848-1854)
* Sir Joseph Dalton Hooker (1873-1878)
* Thomas Henry Huxley (1883-1885)
* George Gabriel Stokes (1885-1890)
* The Lord Kelvin (1890-1895)
* The Lord Lister (1895-1900)
* Sir William Huggins (1900-1905)
* The Lord Rayleigh (1905-1908)
* Sir Joseph John Thomson (1915-1920)
* The Lord Rutherford of Nelson (1925-1930)
* Sir William Henry Bragg (1935-1940)
* Sir Henry (Hallett) Dale (1940-1945)
* The Lord May of Oxford (2000-2005)
* The Lord Rees of Ludlow (2005-)
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http://en.wikipedia.org/wiki/The_Royal_Society
I suppose you'd classify these all as half-wits.