Megacities move to track emissions

Abstract

Gurney foresees a day when the combined results of the greenhouse-gas measurements and modelling will enable cities to pinpoint methane emissions from natural-gas leaks, for example, or identify neighbourhoods that would benefit from traffic initiatives or projects to make existing buildings more energy efficient. Committed to reducing its emissions to 35% below 1990 levels by 2030, the city has pursued a range of initiatives, from cracking down on shipping emissions and ramping up renewable energy to installing more-efficient streetlights and synchronizing traffic lights.