21.   For much the same reason, of course, this country will also bear the biggest costs in terms of investing in cleaner fuels and cleaner plants.

22.   Gasoline price increases expected with the introduction of cleaner fuel earlier this month has failed to materialize.

23.   He attributed that to increased motor fuel taxes, high production rates and pressure from the U.S. Environmental Protection Agency to boost investments that lead to cleaner fuel.

24.   In response, automakers have been working on cleaner engines and cleaner fuels.

25.   It will also require expensive investments in cleaner fuels, cleaner cars and new technologies.

26.   Lower taxes on diesel fuel are needed so that cleaner fuel would not mean drastic increases in the cost of overland shipping.

27.   Ms. Browner is betting that improved technology can deliver cleaner vehicles and cleaner fuels at an affordable price.

28.   New England Petroleum then sold this oil mainly to utilities in the Northeast, which were under pressure from the environmental lobby to reduce pollution by burning cleaner fuels.

29.   Natural gas is a cleaner fuel than coal or oil.

30.   Oil companies, which are spending hundreds of millions to make the cleaner fuel, have said they will try to pass this cost onto consumers.