United Parcel Service this week is rolling out 200 new hybrid gas-electric delivery trucks in eight U.S. cities. Over the course of a year, the 200 new hybrid trucks are expected to reduce fuel consumption by roughly 176,000 gallons and cutting CO2 gases by nearly 1,800 metric tons. The move by UPS is part of a growing trend, identified in a new report from Pike Research about the global market for hybrid medium and heavy-duty trucks and buses. Pike forecasts an increase from 9,000 vehicles sold globally in 2010 to more than 100,000 vehicles in 2015.