Economist: EIGHT months after a trove of e-mails from climate researchers appeared on the internet, yet another inquiry into “climategate” reported its findings on July 7th. Two days earlier the Dutch environmental-assessment agency announced the results of a report it had been asked to produce on possible errors in the most recent review by the Intergovernmental Panel on Climate Change (IPCC). Neither report does anything to weaken the case for acting to limit carbon emissions. Greenhouse gases …