A relentless rise


in Security, The environment

According to data published in Nature Geoscience, global carbon dioxide emissions fell because of the recession in 2009, though by less than initially expected. Now, they are increasing once again.

The atmospheric concentration of CO2 is now at 387.18 parts per million, about 34% above where it was before the Industrial Revolution. For the concentration to stop rising – and the climate to stabilize – net global greenhouse gas emissions must fall to zero.

{ 3 comments… read them below or add one }

. November 23, 2010 at 11:21 pm

The Christian Science Monitor reports that the good news is that emissions from burning coal, oil, and natural gas fell 1.3 percent compared with emissions in 2008 primarily because of the global economic downturn and an increase in carbon-dioxide uptake by the oceans and by plants on land. One big factor was La Niña, a natural seesaw shift in climate that takes place across the tropical Pacific every three to seven years, where the climate is cooler and wetter over large regions of land in the tropics, encouraging plant growth in tropical forests. However the bad news is that even with the decrease in emissions the overall concentration of CO2 rose from 385 ppm in 2008 to 387 ppm in 2009, as concentrations continue to rise even as emissions slip because even at the reduced pace, humans are pumping CO2 into the atmosphere faster than natural processes can scrub the gas. Many countries have agreed in principle to try to stabilize emissions at 350 ppm by century’s end, which would result in a 50 percent chance of holding the increase in global average temperatures to about 2 degrees C over pre-industrial levels.

. November 30, 2010 at 11:09 am

Facing the consequences

Global action is not going to stop climate change. The world needs to look harder at how to live with it


Milan November 30, 2010 at 8:48 pm

Adaptation in response to climate change is necessary, but no substitute for mitigation.

There is no adapting to runaway climate change.

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