Utilize the input text as a context reference, choose the right relationship between Peabody Energy and coal 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.

CalPERS has reported investments in thermal coal mining companies including Peabody Energy and Arch Coal .

Answer: industry