He drives a big rig for a living.
"I use about an average of 120 gallons a day, so anywhere from 5 to 600 bucks, " says Harris.
Those numbers are forcing truckers to reduce consumption.
Many keep costs down by slowing down and the result is better mileage.
Financial necessity has forced the trucking industry to go green.
And it's not limited to driving slower and burning less fuel.
The next time you pass a big rig, look at all those double tires; they're not long for this world.
Single tires mean less rubber and less weight, and less weight means less fuel.
Today, trucks are losing more than tires to keep the weight down.
They're being stripped to the basics. The bottom line is clear: truckers have gone green not by choice, but by necessity.
If there's a silver lining it's this, the change is good for our environment and one of our most important industries.