 Lawson is involved with the climate change denial movement, and believes that man-made global warming has little or no impact.In 2004, along with six others, Lawson joined in the global warming controversy when he wrote a letter to "The Times" criticising the Kyoto Protocol and asserting that there were substantial scientific uncertainties surrounding climate change.In 2005, the House of Lords Economics Affairs Select Committee, with Lawson as a member, undertook an inquiry into climate change.