Cities are essential to fighting climate change, according to new research released today, both oversized contributors to the problem, but also, with the right policy, potential saviors when it comes to cutting carbon emissions. Toward a Healthier World, a new report released by C40, a global network of cities committed to confronting climate change, argues that progressive urban policy can not only make a significant dent in the problem, but benefit the economy at the same time.

Cities in emerging markets could attract $29 trillion in climate-related investments like green buildings and electric vehicles over the next decade, the World Bank's International Finance Corporation (IFC) said on Thursday.

"The science also shows emission reduction potential from other actors such as regional and local governments and businesses – is very large. That means that initiatives like the C40 cities coalition must be commended and supported," Msuya said, referring to a network of 96 cities, including Los Angeles, Boston, San Francisco and Washington, D.C., that are working together to reduce greenhouse gas emissions.

European cities are seeking greater recognition and support for their pioneering efforts to tackle climate change, both from national governments and the European Union, mayors leading the charge said on Wednesday.

Mayors with pro-environmental agendas aren’t just popular. I believe they are an important part of the answer to the global challenge of climate change.