As global leaders prepare for the UN climate change summit next week, we debate what changes individuals can make today to help limit the effects of climate change. The Economist’s environment editor, Catherine Brahic, hosts a roundtable with Christiana Figueres, who convenes Mission 2020 to reduce global carbon emissions; Ed Davey, a director of the Food and Land Use Coalition with the World Resources Institute; and Kevin Anderson, professor of energy and climate change in the school of engineering at Manchester University
