Portsmouth Climate Action Network

Lord Stern, who produced the influential report in 2006 arguing that countries needed to spend 1% of their GDP to stop greenhouse gases rising to dangerous levels, now claims that we need to be spending double that amount.

The reason for this is that Stern sees evidence that climate change is happening faster than had been previously thought and that means that emissions need to be reduced even more sharply.

He argues that the concentration of greenhouse gases in the atmosphere will have to be kept below 500 parts per million. In 2006, he set a figure of 450-550ppm. "I now think the appropriate thing would be in the middle of that range," he said. "To get below 500ppm ... would cost around 2% of GDP."

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Last update : 27-06-2008 05:48

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