Document ID: ./input/supremecourt_opinions/opinions/06pdf/05-1120.pdf
Page Number: 66

Cite as:  549 U. S. ____ (2007) 

13 

SCALIA, J., dissenting 

unreasonable as to be unworthy of Chevron deference. 

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The Court’s alarm over global warming may or may not 
be  justified,  but  it  ought  not  distort  the  outcome  of  this 
litigation.  This  is  a  straightforward  administrative-law 
case,  in  which  Congress  has  passed  a  malleable  statute
giving  broad  discretion,  not  to  us  but  to  an  executive 
agency.  No  matter  how  important  the  underlying  policy
issues at stake, this Court has no business substituting its 
own  desired  outcome  for  the  reasoned  judgment  of  the 
responsible agency.