The United States Supreme Court is expected to release an opinion on West Virginia v. Environmental Protection on Monday, June 27th. See https://www.supremecourt.gov/
The last opinions of the term should be released on Monday before the summer recess.
You can listen to the oral argument here: https://www.oyez.org/cases/2021/20-1530
The docket is here: https://www.supremecourt.gov/search.aspx?filename=/docket/docketfiles/html/public/20-1530.html
This could be a major decision that would change the authority that the Executive Agencies have in making regulations.
The Supreme Court decided CO2 was a pollutant that could be regulated in 2007. 5-4. With Roberts no longer the swing vote thus unable to stand up for keeping wrong decisions because they were decisions, it might be overturned.