Global air pollution crisis 'must not be left to private sector'

Energy authority says governments must take responsibility, and investment would pay for itself in health benefits

The global air pollution crisis killing more than 6 million people a year must be tackled by governments as a matter of urgency and not just left to the private sector, a report from the world's leading energy authority says.

An increase of investment in energy of about 7% a year could tackle the problem, and would pay for itself through health benefits and better social conditions, the International Energy Agency estimates.