wintek also has the second >> reporter: besides supplying apple, wintek also makes touch screen panels for nokia, garmin, and other companies. >> wintek lights up displays that grant oncoming wishes. >> reporter: the case of the iphone workers has shed light on some of the human costs of china's rapid industrialization and prosperity. the nation of 1.3 billion people is transforming itself, turning increasingly into a country that consumes as well as produces goods. for example, apple's four stores in china, including this one in beijing, are on average the firms most profitable. china's increased wealth has raised living standards, although the nation faces a growing gap between rich and poor. at the same time, authorities struggle to balance the needs of industry with the welfare of the environment and workers. to ma jun, a prominent environmentalist, wintek and apple illustrate a troubling pattern in the global supply chain. his beijing based organization, the institute of public and environmental affairs, tries to track china's growing problems with industrial pollution and worker