World Bank : Cities produce roughly 2.6 million tons of carbon emissions each year . Some scientists believe expanding cities could help curb carbon emissions in the long term . Some urban climate change experts give their views on the importance to curb future emissions .
World Bank : Cities produce roughly 2.6 billion tons of carbon emissions each year . Some scientists believe expanding cities could help curb carbon emissions in the long term . Two urban climate change experts give their views on cities importance to curbing future emissions .