Hong Kong’s ‘astronomical’ pollution problem

It's one of the most densely populated places on the planet, and it has a big pollution problem

This presents an enormous challenge for its transport system and its residents. It also creates a huge amount of pollution.

Now, the Hong Kong hopes to tackle this by overhauling its entire transport system; something it hopes will also cut carbon emissions in half by 2020.

Adam Shaw meets Professor Anthony Hedley – a scientist who monitors the cost of roadside pollution. He describes the levels in the city as “astronomical”. 

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