Alt-Fuel

Cheryl Evans/The Republic

The 2000 law was supposed to cost the state $10 million, but in the end costs topped $200 million.

The program gave tax breaks of up to $18,000 to Arizonans who bought an alternative-fuel vehicle.

But drivers were only required to have a few gallons of natural gas in a supplemental tank to get the windfall.

In the end, much of the money went to buy new SUVs that rarely ever ran on the propane.

Lawmakers who supported the bill later admitted they hadn't actually read it.

The scandal cost House Speaker Jeff Groscost his job in the next election, but there was little other fallout.