Document ID: ./input/supremecourt_opinions/opinions/08pdf/07-588.pdf/07-588.pdf
Page Number: 41.0

12 

ENTERGY CORP. v. RIVERKEEPER, INC. 

STEVENS, J., dissenting 

Because  we  granted  certiorari  to  decide  only  whether  the 
EPA  has  authority  to  conduct  cost-benefit  analysis,  there 
is  no  need  to  define  the  universe  of  considerations  upon
which the EPA can properly rely in administering the BTA 
standard.  I would leave it to the Agency to decide how to 
proceed in the first instance. 

III 
Because the Court unsettles the scheme Congress estab-

lished, I respectfully dissent. 

—————— 

question at issue,” Chevron, 467 U. S., at 842, longstanding yet imper-

missible agency practice cannot ripen into permissible agency practice.