ROUSH CleanTech

Last week we celebrated America's 250th by talking to school districts across the country about one of our nation's homegrown energy resources: propane.

Here's to 250 years of innovation—and to fueling the road ahead with American-made energy.

According to the Mackinac Center for Public Policy, the total cost of ownership of a propane bus is about $120,000 less than a diesel bus. Read more:

Electric school bus replacement plan makes you say watt? Uncle Sam provides $125 million for replacement vehicles