In buying cars I would prefer a Hybrid one because a natural gas or propane powered vehicle, like any other vehicle or piece of equipment, is easier to maintain and repair if you understand how it works and what unusual characteristics it might possess. In the face of toughening standards in many nations, as well as a desire to not depend on foreign oil, the world's car manufacturers have all dabbled in different technologies and fuels than the traditional gasoline engine. Electric automobiles seem to get all the attention from the media, but many feel natural gas-powered engines are the way to go. Besides running cleaner, less costly and more efficiently than gas engines, you never have to plug them in. Source of article: >
Natural Gas-powered vehicles: the other green. Natural gas offers a number of environmental and financial benefits to drivers and the public. Because this gas burns so cleanly, it contributes very little to air pollution. In the event of a spill, natural gas dissipates into the air instead of forming a puddle on the ground, which reduces fire risk along with water and ground pollution. According to MSN, natural gas has historically been cheaper than gasoline, which can reduce fuel costs significantly over time.