Pipelines lower costs. To the extent that that's bad, it's because it makes fuel less expensive, so people buy less efficient vehicles that use more fuel. It's the same reason why a carbon tax is a means to reduce CO2.

The fact that the pipelines are in the future makes them less effective at reducing CO2. You want people to buy hybrids and electric cars right now, not wait until years from now. Lowering the present day price of gas is the worst thing to do.

If people are struggling then cut some of the pork and send more stimulus checks instead. Heck, do a carbon tax and refund all the money -- the average person comes out ahead because some of the tax gets paid by corporations and all the money goes to individuals.