FLORIDA - A Florida environmental group says some alternative fuels are actually harder on the environment than gas.

Environment Florida studied the effects biodiesel, liquid coal fuel, and ethanol have on the environment.

The report claims soy biodiesel and liquid coal fuel release 50 percent more harmful emissions than gas.

Environment Florida spokeswoman Holly Binns says despite the recent push for more ethanol production… not all ethanol is better than gasoline.

Holly Binns /Environment Florida "Corn based ethanol really has very few benefits both in terms of fuel efficiency and in terms of pollution, especially global warming pollution, and in fact in a number of cases could be worse than conventional gasoline."

By 2010 all gas sold in Florida has to contain at least 10 percent ethanol.Alternative Fuels