This precipitous decline in the quantity of Earth science and applications observations from space undertaken by the United States reinforces the conclusion in the decadal survey and its predecessor, the 2005 interim report (NRC, 2005), which declared that the U.S. system of environmental satellites is at risk of collapse.

FORBES: Losing NASA's Eyes in the Sky

Here the maths is unambiguous - we have insufficient budget for the carbon we are already emitting and by the time shale gas is produced in any quantity (five to 10 years), there will be no emissions space left for it.

BBC: Viewpoints: Fracking's risks and benefits

Another, which would oppose warming, is a rise in the quantity of sulphate-based aerosols, which encourage cloud formation and thus cool the air by reflecting sunlight back into space.

ECONOMIST: Climate change: Oceans apart | The