New Haven placed 1,900 solar panels on a former landfill, producing 1.4 million kilowatt-hours yearly for 200 homes and $1.5 million over 20 years, while 63 gigawatts of capacity wait across 4,312 closed sites

A capped landfill in New Haven now earns solar income instead of costing upkeep, part of a wider 63-gigawatt opportunity.