Contributor(s): Samantha Heath | In the face of current economic and climatic challenges, decarbonising the economy sometimes amounts to little more than tweaking the supply chain. Samantha Heath will pose the questions that Londoners need to consider before we can transform our behaviour to produce an economy suitable for real people. Samantha Heath is director of London Sustainability Exchange, a member and former co-chair of the London Sustainable Development Commission, and a member of the London Energy Partnership.