While the climate change measure remains mired in the Senate, an alternative that is gaining attention among lawmakers is an energy bill sponsored by Sens. Maria Cantwell, D-Wash., and Susan Collins, R-Maine, that would place a cap on carbon and auction permits to producers or importers of certain fuels. Another possible alternative is reportedly a bill being crafted by Sen. Lisa Murkowski, R-Alaska, that would tax carbon and return the revenue to taxpayers.

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