The concerns come two years after Glencore was granted approval to lift the rate of mining from 2.5 million tonnes of ore annually to 5 million tonnes and the yearly yield of zinc and lead bulk concentrate from 360,000 dry metric tonnes to 800,000 dry metric tonnes.
Utilize the input text as a context reference, choose the right relationship between 'Glencore' and 'mining' from the options.
Options: brand, industry, legal form, location of formation