New York and six other U.S. states have announced plans to sue the Environmental Protection Agency for failing to address methane emissions created by the oil and gas industry. Methane is the second most prevalent greenhouse gas emitted by humans and 21 times more powerful at contributing to global warming than carbon over a 100-year period. In a statement, New York Attorney General Eric Schneiderman said the oil and gas industry is the single largest source of human-made methane emissions and called the EPA’s failure to address those emissions a violation of the Clean Air Act. Schneiderman said: “We can’t continue to ignore the evidence of climate change or the catastrophic threat that unabated greenhouse gas pollution poses to our families, our communities and our economy.”