Jim Hansen: Obama Has "4 Years To Save Earth"

Image: Dr. James Hansen, NASA


Hansen argues urgently for a carbon tax, not cap and trade, which he views as greenwashing in the policy domain.

Sources: www.guardian.co.uk and The Observor

Hansen - head of the Goddard Institute of Space Studies and winner of the WWF's top conservation award - first warned Earth was in danger from climate change in 1988 and has been the victim of several unsuccessful attempts by the White House administration of George Bush to silence his views. Hansen's institute monitors temperature fluctuations at thousands of sites round the world, data that has led him to conclude that most estimates of sea level rises triggered by rising atmospheric temperatures are too low and too conservative. For example, the Intergovernmental Panel on Climate Change says a rise of between 20cm and 60cm can be expected by the end of the century.

However, Hansen said feedbacks in the climate system are already accelerating ice melt and are threatening to lead to the collapse of ice sheets. Sea-level rises will therefore be far greater - a claim backed last week by a group of British, Danish and Finnish scientists who said studies of past variations in climate indicate that a far more likely figure for sea-level rise will be about 1.4 metres, enough to cause devastating flooding of many of the world's major cities and of low-lying areas of Holland, Bangladesh and other nations. (Bold-MTH Editor). As a result of his fears about sea-level rise, Hansen said he had pressed both Britain's Royal Society and the US National Academy of Sciences to carry out an urgent investigation of the state of the planet's ice-caps. However, nothing had come of his proposals. The first task of Obama's new climate office should therefore be to order such a probe "as a matter of urgency", Hansen added.