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.
What is the relationship between 'Glencore' and 'mining' in the context of the input sentence.
Options: brand, legal form, location of formation, industry