So far, 23 nations have committed to enhance their national climate commitments by 2020. Will others join them at next week's UN Climate Action Summit?
Investment in urban measures like efficient appliances, mass transit, walkable cities and more sustainable building materials could garner massive returns, some on relatively short payback periods. And the true scale of benefits goes beyond money: Low-carbon cities are essential to meeting the climate challenge.
In the global battle to rein in greenhouse gas emissions and prevent disasters, most economists agree that a carbon price is a key tool in the toolbox. But what’s less commonly discussed are what policies are needed in addition to a carbon price.