With electricity-powered transportation still in its infancy, many of the world's megacities continue to fight the air pollution, mostly coming from cars' exhaust pipes. Experts say the best tactic is to avoid the worst polluted zones and spend more time in cleaner air areas. Two startup companies are striving to help people find such places. VOA's George Putic reports.
This program will begin at
This program has ended and is being processed for playback.