"A coalition of U.S. states has mounted a broad legal challenge against what it called the Trump administration's illegal suspension of rules to improve the energy efficiency of ceiling fans, portable air conditioners and other products.

The challenge, also joined by environmental groups, came after the U.S. Department of Energy last month delayed standards proposed under the Obama administration to reduce air pollution and operating costs associated with the products.

Ten Democratic attorneys general, plus New York City and a Pennsylvania regulator, on Monday notified Energy Secretary Rick Perry of their plan to sue in 60 days for stalling proposed standards for air compressors, commercial boilers, portable air conditioners, power supplies, and walk-in coolers and freezers."

Jonathan Stempel reports for Reuters April 3, 2017. [2]