A Reuters analysis shows that Berkshire coal plants emit more nitrogen oxide gases than any other coal-fired fleet in the country. Despite big investments in renewable energy, the company has resisted efforts by regulators to make coal plants cleaner. … The air over Omaha, and other areas near Berkshire’s dozen coal-fired power plants nationwide, casts a pall over the environmental record of a company that touts itself at the vanguard of clean energy.
