Mexico City is home to more than 8 million people and is the country’s center of culture, finance and education. But it is also home to one of the world’s largest landfills: the 927 acre Bordo Poniente Landfill. Now, in collaboration with the C40 and its partner the Clinton Climate Initiative (CCI) Cities program, the city is embarking on a project to close Bordo Poniente. The move will not only significantly reduce Mexico City’s greenhouse gas emissions, but it can also generate electricity for residents. It’s an innovative solution to a huge problem, and one that CCI has been developing for more than three years.