It is 30% cleaner vs diesel and 50% cleaner vs coal. India has switched from diesel to natural gas to help with air quality problems and Iran is moving away from oil also towards nat gas. Natural gas is a domestic fuel and it helps get the US off of foreign oil. Consider that with Shale gas the US has the most natural gas in the world...more then Russia, Iran etc. The US imports 5 million barrels per day from countries that are not friendly to the US and that the State department recommends not travelling to so you can see where this is going.....8.5 million trucks in the US burning diesel so as they get older replace them with natural gas fitted trucks and this action alone would cut 2.5 million barrels of oil per day and would cut OPEC in half.
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