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• Cars to have stainless steel fuel tanks 21 Mar 2002 (Forum)
  other states and some European countries are expected to follow California's example. According to the Environmental Protection Agency (EPA) in the U.S., vehicles account for about 60% of the country's total emissions of carbon monoxide, 31% of nitrogen oxides, 30% of volatile organic compounds
• Congestion Charging - A success? 9 Jul 2004 (Forum)
  , such as changing the timing of trips. By reducing the overall volumes of traffic within the charging zone, and increasing the efficiency with which it circulates, congestion charging has been directly responsible for reductions of approximately 12 percent in emissions of both oxides of nitrogen (NOx)and fine
• Blameless diesels need better friends 12 Mar 2015 (Forum)
  (and embraced long ago by many of the majors). Euro 6 has already all but eliminated particulates from diesel exhausts and put them close to petrol engines as low producers of smog-inducing oxides of nitrogen - while maintaining the diesel’s long-time attraction of producing around 20% less CO2