Prices could rise even more in some parts of the country, particularly California, which has requirements for cleaner-burning fuel.

He said the oil industry expected to spend $3 billion to $5 billion to produce the cleaner-burning fuel.

But now that it is the default gift of the day, taste makers are swinging back to cleaner-burning fuels.

It also requires the use of cleaner-burning fuels and low-emission automobile engines.

The wear of the baskets therefore is generally more than other, cleaner-burning fuels.

Jerry Martin, a spokesman for the board, said the board's staff was working on proposed regulations for cleaner-burning fuel.

The newest was one of 260 of the city's 4,800 buses that use compressed natural gas, a cleaner-burning fuel.

And in recent years, the introduction of cleaner-burning fuels has further reduced pollution.

This set the stage for developing cleaner-burning fuels.

Orion said the plant would burn only natural gas, which is a cleaner-burning fuel than the oil that was used during the plant's past life.