In Eco mode, parameters such as the throttle map and air conditioning are controlled for minimal fuel and electrical consumption.

ENGADGET: VW unveils CrossBlue plug-in SUV with iPad mini headrests and 85MPGe efficiency (eyes-on)

We will use your results to build up a map of local air pollution across England.

BBC: York & North Yorkshire - Can you help identify lichen?

The Q, N, E, F, and L lines, as well as most of the trains on the J and Z lines, already have models with electronic map displays, bright blue seats and frosty air conditioning.

WSJ: MTA Moving to Phase Out the C Line's Clunkers