Guardian: The amount of carbon dioxide in the atmosphere has risen to a record high -- again.
For the past nine years the UN World Metereological Organisation has produced an annual greenhouse gas bulletin, with each year notching up a record high for average annual levels, and figures published on Wednesday show 2012 was no exception.
This isn't particularly surprising -- in September the UN's climate science panel, the IPCC, told us that atmospheric CO2 concentrations were at levels "unprecedented...