Car producer criticised for "clean" claim for diesels

The Advertising Standards Authority (ASA) has asked car manufacturer Peugeot Talbot to withdraw an advertisement for its diesel cars after it was unable to substantiate a claim that diesels are cleaner than petrol-driven cars.

The ASA's ruling followed a public complaint about a Peugeot brochure which said that "modern car diesel engines are very 'clean', comparing favourably even with petrol cars with full three-way catalytic converters." The complainant argued that even new diesels produce black smoke.

Peugeot responded by arguing that "clean" referred to environmental pollution in general rather than visible smoke emissions in particular. It defended its cla

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