Uwaga: Tłumaczenia dodatkowych przykładów nie były weryfikowane przez naszych lektorów - mogą zawierać błędy.
So how does this combination of power sources actually cut fuel use?
Drivers in urban areas did even better, reducing fuel use by 23 percent.
However, it did this at the cost of greatly increased fuel use.
Some states, like Florida, even award companies tax breaks for fuel use.
They are also occasionally set to reduce vehicle emissions or fuel use.
And not everyone agrees that a higher tax would reduce fuel use.
These are estimated at 10 percent to 15 percent of fuel use.
"With a car, you can cut your fuel use in half by using a hybrid," he said.
I suspect it has to do with fuel use and efficiency.
In contrast, however, subsidies to fossil fuel use were over $400 billion.