The D.C. Circuit upheld EPA’s decision to defer adopting new secondary NAAQS for oxides of sulfur (SOx) and nitrogen (NOx) pending further scientific study. Citing doubts about the accuracy of its aquatic acidification index model—used to quantify the connection between SOx and NOx in the air an...

A district court held that FWS' delay in developing and implementing a recovery plan for the Canada lynx, which was listed as threatened in 2000, is unreasonable. The ESA directs FWS to prepare a recovery plan for listed species but does not include a timetable or indication of the speed with which ...

The Ninth Circuit held that BLM's roundup or "gather" of approximately 1,639 wild horses and 160 burros from the Twin Peaks Herd Management Area (HMA) on the California-Nevada border complied with the Wild Free-Roaming Horses and Burros Act and NEPA. Post-gather, 793 wild horses and 160 burros resid...

The D.C. Circuit upheld EPA’s decision denying environmental groups’ request to add coal mines to the regulated list of stationary source categories under the CAA. In denying the groups’ petition for rulemaking, EPA made it clear that the denial was not a determination as to whether coal ...

The D.C. Circuit denied industry groups' petition for review challenging EPA's 2013 primary NAAQS for fine particulate matter. In the final rule, EPA lowered the level of the particulate matter NAAQS from 15.0 μg/m3 to 12.0 μg/m3, a level slightly lower than the lowest concentrations reported as c...