The RAC has said there would "negative impact on business efficiency and individual mobility" if a lower speed limit of 60mph was introduced more widely.
While preserving air quality is obviously a paramount concern there will inevitably be a negative impact on business efficiency and individual mobility.
This very powerfully demonstrates the impact that speed has on emissions and many will be surprised to hear that a reduction of just 10mph can have such a significant effect on improving air quality.
Perhaps the Government should be considering reintroduction of incentives to scrap older high polluting vehicles to minimise the need for speed restrictions of the type proposed.
More top news
Figures show seal shooting is on the decline but 51 licences were granted this year permitting the cull of more than 850 marine mammals.
Three goals were enough to send the team through to its first major football tournament finals since the World Cup in 1986.
Particles in Pluto's haze create a stunning blue tinge around the dwarf planet in an image captured by the New Horizons space mission.