The Supreme Court will hear a suit that will

determine whether judges can rule that pollution is a public nuisance and on that basis set limits on carbon emissions.

There is at least one interesting previous decision on the matter, as noted in the article:

The high court gave environmentalists a big win in 2007 when it ruled that greenhouse gases, like carbon dioxide, were air pollutants under the Clean Air Act and subject to federal regulation.

The deal is that such federal regulation has not come forth; hence, this lawsuit.

This approach using the courts is apparently being fought by the Obama administration, which countenances that we need legislation and/or EPA action on this matter, not the courts. I tend to agree with this assessment, for the present, anyway.