The podcast episodes discuss various EPA regulations and their impacts, including the EPA's new rules targeting pollution from fossil fuel power plants, regulations on PFAS 'forever chemicals' in drinking water, and the EPA's role in overseeing the disposal of toxic coal ash waste.

For example, Episode #226 of The Energy Transition Show focuses on the EPA's new regulations requiring many existing coal plants to control 90% of carbon emissions after 2039, while Scientists try to prevent "forever chemicals" from being a forever problem on Marketplace Tech discusses the EPA's newly announced limits on PFAS in drinking water.

Other episodes touch on related topics like the EPA's regulatory authority, industry concerns over grid reliability, and legal challenges to EPA rules.