The company did not do so because it felt no pressure to create a cleaner fuel.
In that way, the development of these clean fuels is given a fair chance.
The package of measures proposed tonight will give us cleaner fuel.
But government can make a difference in the economic pull toward clean fuels and the environmental push.
However, they're still trying to figure out how to use the cleanest fuel of all - the air we breathe.
This is a clean fuel, converted from coal by a chemical process.
Other states and municipalities also have their own requirements for cleaner fuel.
I believe these vehicles must be required to use clean fuel, too, if we want to cut particle emissions.
Improvements to car standards and cleaner fuels are a necessity.
In fact, it could be the ultimate clean fuel.