Putting parties’ climate pledges to a proper test

Putting parties’ climate pledges to a proper testResearchers including Prof Rick Stafford assess the environmental policies of Labour, the Tories, the Lib Dems and the Greens; Caroline Lucas hails her party’s Green New Deal; and Tony Jones says a national policy against any airport expansion is required Tony Jones says airport expansion is ‘a national issue which demands a national policy’. Photograph: Steve Parsons/PA