The Ninth Circuit ordered EPA to respond to a petition requesting that the Agency end the use of the pesticide tetrachlorvinphos (TCVP) in household pet products. An environmental group submitted an administrative petition to cancel the registration of TCVP in 2009, following a peer-reviewed study t...

The D.C. Circuit reversed a district court's dismissal of a challenge by scientific advocacy groups to EPA's directive barring recipients of EPA grants from serving on any of the Agency's advisory committees. The groups argued that the directive lacked a reasoned explanation for changing its policy,...