The Rockefeller Foundation and LACI are celebrating their national partnership to create city innovation sandboxes, including with New York City. Called the City Climate Innovation Challenge, startups are invited to pilot solutions that help solve key priorities—like zero emissions delivery—and then work to help scale what works. By doing so, C40 and LACI research shows cities can reach a 35 percent additional reduction in GHGs and create a $5 trillion market globally.