Is the once-high ground held by the diesel car at risk?

Many of you will have read recent articles predicting the demise of the diesel engine and the possible concerns that owners, and indeed dealerships, may have should the current ripples turn into a tidal wave. Industry rumbles can precipitate a reaction from the public; we saw an example of this with 4 x 4 product a few years ago, with a ‘rush to sell’ by many owners. So, could a similar type of worry start a diesel exodus, and...