Emissions-free transportation zones, planting trees, encouraging bicycle use and powering utilities with renewable energy are among the easiest ways for cities to go green. Eco-conscious policy makers in some of the world’s largest cities are pushing further, aiming for carbon neutrality—the state of net zero carbon emissions, in which offsets equal carbon production. To achieve this, they’re putting new plans into action that take the goals of the 2015 Paris Climate Accords into account and making public the dates they have set to achieve them.
