Exhausting topic

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London is leading the way when it comes to making its air more breathable – and getting bus operators to reduce emissions

Bus and coach operators must cut emissions – and that could mean retrofitting cleaner technology. John Lewis reports

Bus and coach operators all over the UK are facing growing pressure from local authorities to cut diesel exhaust emissions. The big enemies so far as councils are concerned are nitrogen oxide (NOx), which includes nitrogen dioxide (NO2), and particulates – both of which are potentially damaging to public health.

Cutting their presence means meeting Euro 6. The problem is that disposing of Euro 5 vehicles earlier than originally planned and acquiring Euro 6-compliant models to replace them means major capital expenditure at a time of continued economic uncertainty. That of course presupposes that a decision hasn’t been taken to abandon diesel altogether and opt for electric, gas or hydrogen-fuelled vehicles instead. But why dispose of a Euro 5 or possibly older bus if it can be upgraded to Euro 6 by retrofitting the appropriate equipment? It is a route a growing number of fleets are pursuing – and several specialist manufacturers are only too eager to help them. […]

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