Here's another observation (not a thought experiment): To figure out which scenario pollutes more, one could add up the various inputs and outputs. A producer i

Here's another observation (not a thought experiment): To figure out which scenario pollutes more, one could add up the various inputs and outputs. A producer is limited by the volume and cost of different means of transportation. It isn't apodictically true that the same volume of tar is delivered regardless of the means, so preventing a pipeline from being built does not necessarily increase net pollution. That being nebulous, the Democrats' motivations are less nebulous.