Carbon Fee From Obama Seen Viable With Exxon Backing

Exxon Mobil Corp. is part of a growing coalition backing a carbon tax as an alternative to costly regulation, giving newfound prominence to an idea once anathema in Washington.

Conservative economists and fossil-fuel lobbyists united in 2009 to fend off climate-change legislation that would have established a cap-and-trade mechanism. They are now locked in a backroom debate over a tax on carbon-dioxide emissions that could raise an estimated $100 billion in its first year.