Brown is going green

That's right: UPS has joined forces with the EPA to start "greening" its fleet of delivery trucks.

The trucks are powered by an eco-friendly hydraulic hybrid system that combines a diesel engine with a unique hydraulic propulsion system. The technology was developed in the EPA laboratory in Michigan and patented by the government agency.

Government testing has shown that the trucks use 50 percent less fuel and have much lower carbon emissions than regular delivery trucks.

While this initial order is only for seven delivery trucks, the company hopes that the EPA can work out agreements with manufacturers to mass produce the trucks, making them able to be affordably purchased in large quantities.

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