Regardless of how the world’s governments choose to attempt to contain global warming at 2 degrees Celsius above pre-industrial levels, it’s going to cost them. According to an early version of the U.N.’s Intergovernmental Panel on Climate Change report, due out in April, the world will need to triple its current amount of renewable energy, nuclear power and carbon-capture and storage activities in order to significantly reduce the amount of greenhouse gas levels in the atmosphere. Bloomberg News reports on the leaked draft:

The researchers found that all scenarios that stabilize the concentration of greenhouse gases in the atmosphere at or below 480 parts per million of carbon dioxide are “likely” to contain the temperature gain to below 2 degrees Celsius. Some scenarios that peak above 530 ppm before coming down to a range of 480 to 530 ppm would also achieve that.

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