Green growth coming from an unlikely source

Environmentalists just got some great news.
America’s power plants will emit 2.3% less carbon dioxide this year compared to 2018. Even better, emissions will continue falling next year, according to a new report from the U.S. Energy Information Administration.
This progress isn’t the result of new environmental protections or alternative-energy breakthroughs. The credit actually belongs to natural gas firms.
These companies have harvested such massive quantities of the cheap, relatively clean-burning fuel that power plants…