Chicago’s skyline at night. Photo by Jon Herbert, via Flickr.

Climate action plans—sets of strategies designed to reduce greenhouse gas emissions and other negative environmental impacts—play a critical role in realizing a community’s sustainability vision. While dozens of cities have such plans, few have the supplemental programs to set them in motion. However, there are leader communities that are making notable efforts on implementation.  Chicago, IL and Boulder, CO are two of those cities, and they are using benchmarking and pricing to reduce carbon emissions.