What began as a group of neighbors hoping to reduce their impact on global warming has since become a major force for solar advocacy in Washington, DC. The Mount Pleasant Solar Cooperative was started by two teenage boys who wanted to make solar power convenient and affordable through a bulk-purchase program. Along the way, the cooperatives new members realized that buying power wasn’t enough, and sought out changes in the district’s energy policies.  Today the Mount Pleasant Solar Cooperative has helped to get solar panels on over 10 percent of the homes in the Mount Pleasant Neighborhood and has grown into a city-wide political organization.