The Senate Proposals
Five climate change bills have been introduced in the Senate. Here's a comparison of some of their provisions.</br></br>Economy-wide: Petroleum refiners and natural gas producers, non-carbon-dioxide greenhouse gas emitters, large coal-consuming facilities</br></br>Establishes a price ceiling at $12 a ton for carbon credits in 2012 and raises that ceiling at an annual rate of 5 percentage points higher than inflation.</br></br>At the start, a majority of allowances would be distributed free to past industrial users, about a quarter would be auctioned and the rest used to provide technology incentives or aid to low-income families. Increasing amounts would be auctioned</br></br>Economy-wide: Petroleum refiners and natural gas producers, fluorinated gas producers and entities that emit more than a certain amount of carbon dioxide