This report from the BBC today: BBC News - Diesel exhausts do cause cancer, says WHO So, as diesel has been around since the very early days of motoring, how many deaths from lung cancer attributed to tobacco in the past could now be attributed to diesel fumes instead? Did we get it all wrong? Can we start smoking in pubs again? On the other hand, various organisations are well-known for producing reports promoting their research (and therefore gaining more funding) at time calculated to be to their advantage. Can we trust this report from the UN? Debate at leisure (bot possibly not over a fag or two just yet ....).