Smart London Solving London’s environment challenges by bringing together people, technology and data. Mayor's Entrepreneur Your chance to take the title of Mayor’s Entrepreneur from Twipes and win £20,000 to bring your idea to life. Circular economy Keeping London’s goods in use for as long as possible. Environment publications London Low Carbon Market The value of London’s Low Carbon and Environmental Goods and Services sector in 2011/12 was worth £25.4bn to the economy Secondary Heat Study Heat networks can and must begin to make use of alternative sources to facilitate the transition towards near-zero heat. Smart Energy The Mayor is also interested in how decentralised energy can form part of a Smart energy system. Environment newsletter Sign up now to receive updates on environmental policy, projects, events and opportunities.