Utilize the input text as a context reference, choose the right relationship between Glencore and mining from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Glencore is not alone in struggling; many mining companies face a difficult market environment due to the steep fall in price of commodities such as oil and copper, prompted by the fall in demand which has resulted from China’s economic slowdown.

Answer: industry