Sergio Marchionne, CEO of Chrysler, said that Chrysler plans to introduce a Fiat in the U.S. powered by natural gas. Bloomberg/Businessweek quotes Marchionne: "Natural gas engines offer a better way to cut emissions because they are cheaper than competing technologies."

Fiat is the leader in Europe in natural gas engines with 80% share of methane powered cars and 55% of light commercial vehicles. Alfredo Altavilla, quoted in Bloomberg/Businessweek said natural gas is a "more affordable solution" as it is less expensive to produce transport and distribute compared with other fuel sources.

BP Plc.'s (BP) Deepwater Horizen oil spill in the Gulf of Mexico -- the nation's worst spill in the modern era -- may increase interest in alternative transport fuels for cars and trucks. And a leading contender is: natural gas.

Domestic, cleaner, abundant, and (so far) cheaper than oil, natural gas has the potential to displace a significant amount of oil as a transport fuel.

Westport Innovations (WPRT) is one publicly-traded company that sees a bright future for natural gas in the commercial truck sector, among other transport, industrial, and power generation applications.

"China Natural Gas (CHNG) is one of the leading providers of pipeline natural gas for industrial, commercial and residential use in the Xi'an region of China; the company also distributes compressed natural gas (CNG) for vehicular fuel through natural gas fueling stations," notes China specialist Jim Trippon.

The editor of The China Stock Digest explains, "Xi'an is a fast growing Chinese city supported by a population of approximately 8.5 million. Xian (as Westerners know it) is the "gateway" to the broad western regions of China. The city of Xi'an has approximately 20,000 taxis, 5,000 buses and 3,000 special purpose vehicles that are powered by compressed natural gas.

Given the smorgasbord of economic demands and concerns -- domestic and foreign -- likely to face the new U.S. president, investors (and taxpayers) can justifiably ask 'Where's all the money going to come from to pay for these programs?'

Legitimate question, but one, for now, we'll let the political process sort out. (Current Gallup Daily Tracking Poll as of August 6, 2008, for the U.S. presidential election: Obama, 46%, McCain, 44%.)

Electing U.S. Sen. Barack Obama, D-Illinois, or U.S. Sen. John McCain, R-Arizona, will produce different programs and revenue priorities, due to the parties' different sources of power, but the argument forwarded here is that -- regardless of who becomes the new president -- the office holder should address transportation in a comprehensive way. Here are the major concern areas:

• Mass transit: We're early into the $4 gas era, of course, but initial U.S. Department of Transportation data indicates Americans are driving less and using mass transit more. The trouble is, many mass transit systems (rail, commuter rail, subway, bus) need to be expanded/upgraded to handle the increased ridership. Bigger, better mass transit systems will save the United States hundreds of billions of dollars in oil costs, not to mention the environmental benefits.

Billionaire oilman T. Boone Pickens has launched a new campaign to substitute at least a portion of the U.S. imported oil with domestic natural gas.

Pickens would like renewable energy sources, wind power chief among them, to run electric power generation plants currently run by natural gas/coal, and use that natural gas to fuel natural gas vehicles.

Economist Glen Langan told BloggingStocks Thursday the PickensPlan is commendable for a number of reasons (it would lower the trade deficit, create domestic jobs, and decrease greenhouse gas emissions), but investors and readers should not view it as a panacea for the nation's transportation energy bill. "It could be a part of the solution, but it won't address the entire imported oil problem," Langan said.

Another oil saver: better engines

What's another key to reducing both imported oil and U.S.-produced oil consumption? Something that the U.S. auto sector has under-emphasized for more than a decade: technology-driven increases in car/vehicle efficiency, Langan said.

Langan said vehicle weight reduction, transmission/drive train improvements, enhanced aerodynamics, and the biggest factor -- increased engine efficiency -- "have the potential to reduce oil imports by almost as much as the Pickens Plan, and the changes won't take 10 years to see the results."

Further, many of the mpg-enchancing technologies already exist, Langan notes; he suggested an additional federal tax credit for automakers to help them incorporate the changes sooner.

"The fleet [all vehicles driven in the U.S.] should average 25-27 miles per gallon right now. Currently we're at about 20 miles per gallon. With appropriate federal tax credits we could be at 30-32 miles per gallon in five or seven years," Langan said.