The popular three-wheeled vehicles known as auto rickshaws are common in Asian cities where due to their older two stroke engines they have been significant contributors to the current air quality issues that plague the urban areas. Recent changes to four-stroke engines as well as those powered by diesel, compressed natural gas (CNG) or liquefied petroleum gas (LPG) reduce the pollution and greenhouse gas emissions. However, because of the large number of vehicles emission of such vehicles is still an important issue.

This report presents a side-by-side comparison of fuels and vehicles with the recognition that future technological advances or additional research into unresolved issues, such as the land-use impact of biofuel production, could alter findings and make certain options more or less attractive.

A concept car that attempts to sidestep the three main hurdles to the dream of hydrogen-fuelled highways was unveiled in London this week.

China will give 43,000 yuan ($6,300) in subsidies to buyers of hybrid car buyers in the southwestern city of Chongqing, the first state initiative for private cars, the Shanghai Securities News said on Friday.

The subsidy, from the local government, will be given for the Jiexun brand hybrid sedan made by Chongqing Changan Automobile Co, the newspaper said.

Norway opened a 560 kilometre (350 mile) "hydrogen highway" on Monday with more than a dozen hydrogen-powered cars rallying along a scenic route between its capital city Oslo and North Sea oil hub Stavanger.

The debate about the future of the U.S. automobile industry exemplifies the shortcomings of U.S. public discussion about large-scale technological change. The auto industry has been widely vilified in recent months, with public opinion running strongly against government financial support for it.


A fuel cell vehicle is definitely an advantage over the smoke-spewing cars, and many companies are already planning such vehicles, writes Sangeeta Sen

Will hydrogen ever transform the way we heat our homes and fuel our cars?

Rail travel produces more than a third less emissions than road transport