So how does this combination of power sources actually cut fuel use?

However, it did this at the cost of greatly increased fuel use.

And not everyone agrees that a higher tax would reduce fuel use.

"With a car, you can cut your fuel use in half by using a hybrid," he said.

Some states, like Florida, even award companies tax breaks for fuel use.

I suspect it has to do with fuel use and efficiency.

And we know that the use of fossil fuels will double by the year 2020.

Furthermore, the use of alternative fuels has a positive impact on our environment.

So, we need to control the use of fossil fuels, because they can harm our world.

Drivers in urban areas did even better, reducing fuel use by 23 percent.