Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Nike's 'Making' app: helping designers choose most sustainable materials

As we're told more and more frequently about the impact of our environmental footprint on the world, it's no surprise that companies of all disciplines are examining their processes to cut emissions and waste. Now Nike has entered the fray by developing a free app giving designers a deeper insight of how green their material choices are. The sportswear giant's new free ‘Making' app allows designers to examine the sustainability of 22 different product materials such as cotton, silk and grass-fed leather.

M25 speed cameras not switched on

Most speed cameras on the M25 have not worked for five years, according to a report in the Sunday People newspaper. Of the 117-mile stretch of London’s orbital motorway, only 3.2 miles between Junctions 2 and 3 in Kent is covered by working cameras. On Bing: see pictures of speed cameras Cars most likely to be caught speeding in the UK The cameras, which sit behind overhead gantries imposing lower speed limits during congested times, haven’t been switched on since they were installed in 2009.

2013 Astra Convertible spied on video – The new Vauxhall Calibra / Opel Manta?

2013 Astra Convertible Spy Vauxhall and Opel have now managed to reveal much of the new Astra Model range – with the Astra GTC debuting at Frankfurt last month being the latest – but there’s still the drop-top Astra Convertible to come. The 2013 Astra Convertible – which may arrive as the new Vauxhall Calibra – has been caught on video testing ahead of an expected debut at Paris in 2012, before going on sale across Europe in 2013. Looking very much like the GTC with a cloth top, the new Astra Convertible loses the tin-top of the old model and gets a folding canvas top in the name of economy, lightness and dynamics.