As I’ve said…

…Republicans pose an existential threat to the planet. Let’s consider two articles.

The first reports that carbon dioxide emissions surpassed 400 parts per million last year, about a year ahead of schedule, and that concentrations will continue an upward climb, never falling backwards.

“Once you have passed that barrier, it takes a long time for CO2 to be removed from the atmosphere by natural processes,” [Professor Richard Betts of the Met’s Hadley Centre and Exeter University] said. “Even if we cut emissions, we wouldn’t see concentrations coming down for a long time, so we have said goodbye to measurements below 400ppm at Mauna Loa.”

Climate scientists have consistently warned that if concentrations reach 450 ppm, then global temperatures will exceed the two degrees Centigrade threshold, long considered the cutoff between planetary disaster and species survival.

The UN’s Intergovernmental Panel on Climate Change (IPCC) says that CO2 concentrations must be stabilised at 450ppm to have a fair chance of avoiding global warming above 2C, which could carry catastrophic consequences.

Then there are the Republicans. They just denounced a carbon tax, which even conservative think tanks believe is the right, market-based approach to reducing greenhouse gas emissions.

Meanwhile, Mr. Marmalade denies global warming. WTF.