I found this mildly amusing
People have blamed the retreat of ice in the Arctic on carbon-dioxide driven global warming. However, new research at NASA suggests that environmental intervention in the 1970s could bear most of the blame. The elimination of aerosol particle emissions have removed a cooling element for the northern hemisphere, which has reduced a natural balance in the climate on the effect of human activities:
New research from NASA suggests that the Arctic warming trend seen in recent decades has indeed resulted from human activities: but not, as is widely assumed at present, those leading to carbon dioxide emissions. Rather, Arctic warming has been caused in large part by laws introduced to improve air quality and fight acid rain.
Dr Drew Shindell of NASA’s Goddard Institute of Space Studies has led a new study which indicates that much of the general upward trend in temperatures since the 1970s – particularly in the Arctic – may have resulted from changes in levels of solid “aerosol” particles in the atmosphere, rather than elevated CO2. Arctic temperatures are of particular concern to those worried about the effects of global warming, as a melting of the ice cap could lead to disastrous rises in sea level – of a sort which might burst the Thames Barrier and flood London, for instance.
Go there to read the whole thing.