This month, officials in Los Angeles, California, are expected to approve a deal that would make solar power cheaper than ever while also addressing its chief flaw: It works only when the sun shines. The deal calls for a huge solar farm backed up by one of the world's largest batteries. It would provide 7% of the city's electricity beginning in 2023 at a cost of 1.997 cents per kilowatt hour (kWh) for the solar power and 1.3 cents per kWh for the battery. That's cheaper than any power generated with fossil fuel.

Also:

As if on cue, last week a major U.S. coal company—West Virginia–based Revelation Energy LLC—filed for bankruptcy, the second in as many weeks.

This seems like a double-whammy of good news, but I’d love to have a better understanding of the environmental impact of building massive batteries and multitudes of solar panels before jumping for joy.