The most polluted city in China
World leaders are gathered in Paris for the much talked about United Nations Climate Change summit.
The fortnight-long meeting is aimed at hammering out a deal between more than 190 countries to significantly reduce their carbon emissions.
The pressure's expected to weigh heavily on the world's largest carbon emitter, China.
Charlotte Glennie reports on one of the dirtiest cities in the world.
30 Nov 2015