Greenhouse gases at historic high
BBC reports here: Current levels of the greenhouse gases carbon dioxide and methane in the atmosphere are higher now than at any time in the last 650,000 years.
See also here from Wired News: Ocean and so-called greenhouse gas levels are rising faster than they have for thousands of years, according to two reports published on Thursday that are likely to fuel debate on global warming." Reference also here Climate-Change Forecast? Ask the Antarctic Ice form National Geographic News from back in 2004 and here the Quaternary Studies.