Senator Kohn : The U.S.-China agreement to cut carbon emissions is a big deal . Kohn : Republicans need to face up to the fact that global warming is real and man - made . She said the Corridor XL pipeline would be bad for climate and U.S. economy . In other words , just as China is finally taking a significant step forward in reducing climate change emissions , the United States risks taking two steps back . Kohn : Go ' n't treat climate change as partisan football and set U.S. behind .
Senator Kohn : The U.S.-China agreement to cut carbon emissions is a big deal . Kohn : Republicans need to face up to the fact that global warming is real and man - made . She said the Corridor XL pipeline would be bad for climate and U.S. economy . Kohn : Go ' n't treat climate change as partisan football and set U.S. behind .