"Exxonmobil corp., the world's largest crude oil refiner, supports taxing carbon dioxide as the most efficient way of curbing greenhouse gas emissions, its chief executive said."

(source)

This is identical to how the large meat manufactures were the first to support the FDA, U.S. Steel supported price controls and WalMart supported the minimum wage. These government taxes and regulations only help the largest businesses who are able to pay for the lawyers and transaction costs necessary to abide by the government controls.

By Exxonmobil supporting a carbon tax, all it is really asking for is for the government to destroy its competition. Exxon will be able to afford all the lawyers and innovation necessary to reduce the harmless amounts of CO2 it produces. Moreover, it will likely invest in carbon credits and sell its credits on the market for profit. Keep in mind that carbon credits are worthless pieces of paper but for the government controls.

Nevertheless, Democrats and environmentalists will use this as "proof" that Anthropogenic Global Warming is a problem. "Look, even Exxon agrees," they will say. Ironically, people on the Left will support Big Business, and then call for hearings when Exxon makes record profits again.