28 Apr '16, 4pm

Diesel is probably dying; will gasoline powered cars follow?

In Europe, almost half the cars on the road have diesel engines. Governments promoted this because diesel emits less carbon dioxide per mile. It seemed like a good idea at the time, but now it turns out that without cheating or lying, 97 percent of the diesel cars on the road exceed the nitrogen oxide (NOx) standards. According to the Guardian, Diesel cars must meet an official EU limit for NOx but are only tested in a laboratory under fixed conditions. All vehicles sold pass this regulation but, when taken out on to real roads, almost all emit far more pollution. There is no suggestion that any of the cars tested broke the law on emissions limits or used any cheat devices. It appears that people drive differently than the testing equipment, which grossly underestimates the actual tailpipe emissions. Also the exhaust gas recirculation system, designed to reduce emissions, ...

Full article: http://www.treehugger.com/cars/diesel-probably-dying-will...

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