The World Health Organisation estimates seven million people die each year from exposure to fine particles in polluted air, which can cause stroke, heart disease, lung cancer and respiratory infections.
The latest World Health Organisation report has revealed 90 per cent of the world's people are breathing polluted air.
Air pollution levels remain dangerously high in some of the poorest countries and it's killing 7 million people each year.
Air pollution inequality between wealthy and poor countries is widening.
The latest World Health Organisation report shows declining pollution levels in some part of Europe and the Americas, but concentrations of air particles are still dangerously high in many parts of Asia, India and the Middle East.
According to the study New Delhi, Cairo and Beijing are among the most polluted cities on the planet.
Fo urteen of the world's worst-scoring cities are in India.
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