Icelandic Volcanoo about to erupt, could blot out sun, cause worldwide crop failure.

[link to www.bbc.co.uk]

"Katla is part of a volcanic zone that includes the Laki craters. In 1783 volcanoes in the area erupted continuously for eight months, generating so much ash, hydrogen fluoride and sulphur dioxide that it killed one in five Icelanders and half of the country's livestock.

"And it actually changed the Earth's climate," says Mr Cochran.

"Folks talk about a nuclear winter - this eruption generated enough sulphuric acid droplets that it made the atmosphere reflective, cooled the planet for an entire year or more and caused widespread famine in many places around the globe."