worst industries for polluting the environment. the country manufactured 1 billion tons of it last year as the construction industry boomed out as the cop26 climate summit approaches, china is continuing to grapple with how it can keep its pledges on reducing carbon emissions. robin brant went the steel city of wuzhou in southern china to investigate. build and build big has been the mantra in china for decades. it is in their blood. as we crashed a card game in a nearby empty shopping mall, granddad told me ten years ago, this part of the city was fields. it is everywhere in wuzhou. here the trucks, you see the clusters of cranes, all