All eyes on cities

Now that the national effort to curb carbon emission may stall, all eyes are on cities. Cities are both major contributors to CO2 emission and in the front line to face the dire consequences of climate change since "90 percent of urban areas in the world are coastal." Coastal areas are under imminent threats of sea level rise, flooding, storm surge, etc. This actually creates a situation to avoid the tragedy of the commons. Big cities around the world like the C40 group have already started making serious attempts to cut carbon emission, which gives us hope that the daunting global problem can find a local solution.