air quality

Personal air quality monitor uses ambient energy from wifi and mobile networks to track pollution data

Company confirms around 500,000 Volkswagens and 400,000 Audis involved in emissions scandal

Diesel emissions-rigging scandal continues to deepen as Audi admits using 'defeat devices' in 2.1 million cars

Department for Transport to compare laboratory tests to 'real world driving emissions'

Countries publicly calling for investigations into VW emissions rigging scandal have privately fought to keep loopholes in car tests for carbon emissions

Martin Winterkorn says he is shocked by events of past few days and hopes to provide auto giant with fresh start by resigning

Environmental Audit Committee chair Huw Irranca-Davies says diesel drivers need assurances they have not been deceived by automakers

VW says 11 million vehicles globally fitted with defeat device, which helps cars pass emissions tests

Volkswagen faces $18bn in fines after US regulators found thousands of cars giving false data on emissions

Landmark new study outlines road map for top-emitting countries to deliver 2C world