When the state of California got turned down by the Environmental Protection Agency in December in their request for a waiver to regulate greenhouse gas emissions, they wasted no time in suing the feds. California wants to regulate emissions of carbon dioxide from vehicles and by extension fuel consumption. With at least a dozen other states wanting to follow California's lead on regulations, it should come as no surprise that Florida has now joined the California suit.

The EPA ruled that because the CO₂ limits effectively regulate fuel efficiency, federal rules take precedence. The Supreme Court had previously ruled that the EPA had the authority to regulate CO₂ emissions under the Clean Air Act which implies that the greenhouse gas emissions should be able to be regulated by California. The EPA has so far declined to impose any CO₂ limits which prompted California to make a move.

[Source: State of Florida]