As much as hate to think this but I have reason to believe that in more recent cases the environmental regulations are being designed to get the state and federal governments revenue rather than actually help clean the air.
For instance these stupid cap and trade enviro laws (specifically California) allow companies to buy and sell pollution credits. Sure Company A, B, C, etc may not use all their polution credits so they sell them all to company X who in turn pollutes the h*ll out of the local environment.
If the EPA or State governments were so concerned about smog in congested areas like LA they would makes laws mandating that every vehicle that operates in said areas burn compressed natural gas instead and leave gasoline burners in the rural areas.
Also, while on the energy consumption subject, States like California would mandate every house (especially those in the southern deserts) to use solar collectors as a primary source to heat water to store and use an on demand tankless water heater for a secondary source instead of a wasteful tank water heater.
Nope, as I said the feds and the states want us to spend our money on the real wasteful and environmentally threatening forms of consumption for the fees and tax revenue all the while threatening to craft laws and mandates that would prevent us the consumer to buy 52" flat screen TVs that really waste energy and cost the consumer a bit more than $18 per year for electricity if we were to be forced to buy the puny 22" models ==>
Flat-screen TVs to face energy-efficiency rules in California - Los Angeles Times