There is indeed evidence that there was unusual medieval warmth in Northern Europe, and Greenland - but no evidence that it was anything more than regional, and no evidence at all of a global and synchronous warming such as is happening now.
Here's the HSE on White Asbestos http://www.hse.gov.uk/press/2002/e02010.htm
Here's the HSE on White Asbestos http://www.hse.gov.uk/press/2002/e02010.htm





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