A raft of new technologies promise to clean up cities' pollution problems - but can they offer a viable alternative to diesel?
The emissions fixing scandal that has engulfed Volkswagen, the world's biggest car maker, is showing no sign of abating this week, with Audi and Skoda confirming they too have sold millions of cars fitted...
Negotiators expect talks to run into the weekend, but hopes for finished rule book remain high
BusinessGreen brings you this week's green business news from around the world
Plans to link smart home energy appliances with its time-of-use tariff aimed at further boosting flexibility, cutting energy use and slashing emissions
Work on the 'opposed piston' design from Achates Power, which dramatically cuts nitrogen oxide pollution, has been backed by federal and state grants