diesel cars may be worse than petrol for co2 emissions, report claims /

Tailpipe emissions of black carbon from diesel engines may be up to 50% higher than previously thought,according to fresh researchDiesel engines may be doing nothing to slow global warming despite being the spine of Europe’s policy to reduce car emissions, a fresh report claims.
Tailpipe emissions of sooty ‘black carbon’ could be as much as 25-50% higher than the EU estimates for cars made before 2005, and says the paper by Professor Erckard Helmers of Triers University.
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Source: theguardian.com