A research in 2010 from the World Bank found that 50 of the largest cities and urban areas on the planet is now home to about 500 million people and spewed some 2.6 billion tons of greenhouse gases every year.
As urban migration continues apace, these numbers are only expected to rise in the short term. While this may initially lead to more pollutants being pumped into the Earth's atmosphere, some experts believe it could work better in the long term. They say that the ecological efficiency of the city can be offered, according to their financial and political influence, could lead to developing more effective ways to curb carbon emissions.
As the world's environmental leaders gathered in Durban, South Africa 2011 to the UN Conference on Climate Change (COP17), CNN asked two experts of climate change to explain the role of complex urban city.
Dr. Stephen Hammer is co-director of the Urban Climate Change Research Network, a consortium of academics and institutions dedicated to the analysis of climate change mitigation, and adviser to New York City Energy Policy Taskforce.
Source : www.cnn.com
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