A district court held that a conservative nonprofit group lacked standing on four of its six claims challenging Colorado's renewable energy standard (RES), which requires utilities to obtain at least 30% percent of its energy from renewable sources by the year 2020.

The Seventh Circuit affirmed a lower court decision dismissing a CERCLA citizen suit challenging remediation work at three landfills in Indiana. The remediation work was divided into three stages.

The Federal Circuit held that the U.S. government must reimburse four oil companies for CERCLA costs they incurred cleaning up contamination stemming from the production of high-octane aviation gas (avgas) during World War II.