The ruling from the UK’s highest court will also put pressure on the Scottish Government and Glasgow City Council to do more to reduce toxic exhaust fumes, blamed for killing over 2,000 people every year in Scotland.
Nitrogen dioxide gas and tiny sooty particles belched out by cars, lorries and buses can cause asthma, bronchitis, lung cancer and breathing problems. The pollution can also trigger heart attacks and strokes.
A study by the World Health Organisation on Tuesday estimated that air pollution is costing Europe over a trillion pounds a year. That includes the costs of over 600,000 premature deaths a year across the continent, and many more illnesses.
In a unanimous verdict from five leading judges in London, the Supreme Court agreed to issue a mandatory order requiring Westminster to prepare and deliver new air quality plans to the European Commission before the end of 2015.