Cities worldwide are stepping up to the challenge of reducing their greenhouse gas (GHG) emissions. Increasingly, cities are making big changes and pressing other levels of government and the private sector to do much more to combat climate change. As part of this movement, a handful of cities came together several years ago to form the Carbon Neutral Cities Alliance (CNCA), now a global collaboration of 20 cities cutting emissions by 80% or more by 2050 or sooner. At CNCA, we help each other move further and faster to achieve GHG reduction, and we share what we learn and know with other cities. There are few emissions reducing practices that our cities have not tried; in fact, these cities have pioneered many of them.
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