Detailed text transcripts for TV channel - MSNBC - 20170309:22:47:00
>> do you believe that it's been proven that co 2 is the primary control knob for climate? do you believe that? >> no. i -- no. i think that measuring with precision human activity on the climate is something very challenging to do and there is tremendous disagreement about the degree of impact. so no, i would not agree that it's a primary contributor to the global warming that we see. but we don't know that yet as far as -- we need to continue to the review and analysis. >> we need to continue to debate. nasa, and the epa's own website all point to human activities as the most likely cause ...