NEW YORK, Nov. 21 -- The Environmental Defense Fund issued the following news release: EPA's strengthened Mercury and Air Toxics Standards are achievable, affordable, legally sound, and vital for protecting public health from potentially deadly air pollution, a broad group of health and environmental groups - including Environmental Defense Fund - has told the U.S. Court of Appeals for the D.C. Circuit. Fossil fuel companies and a group of states led by North Dakota and West Virginia have sued  more