Edie: A coalition of European cities have formalised plans to work together to reduce their contribution to climate change. The Covenant of Mayors sees cities sign up to making deeper carbon cuts by 2020 than are currently required by the EU. London is among the cities to have adopted the new goals, though City Hall had already set a goal of reducing the capital’s emissions by 60% by 2025, I greater target than that set by Europe. Signing the Covenant also gives cities more …