California’s quest to reduce global warming hit another obstacle on Tuesday. A conservative legal group filed suit to block California’s new cap-and-trade carbon market.

The Pacific Legal Foundation alleged that the market’s charge for carbon emissions violates California law because it constitutes a tax, and taxes in California require approval by a two-third majority in both houses of the state Legislature.
“California’s cap and trade regulation was developed and is being implemented in full accord with all state laws,” Dave Clegern of the California Air Resources Board (abbreviated as both CARB and ARB) said in an email response to the lawsuit. “ARB will continue moving forward with this important program to fight climate change and develop a clean energy future for California.”
The cap-and-trade market is the centerpiece of California’s effort to reduce emissions of gases that cause global warming. It launched Nov. 14.
Cap and trade functions like a stock exchange for greenhouse gas emissions . Businesses, including oil refiners and manufacturers, have to buy permits for each ton of carbon they emit and can then resell these permits.