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.
Take context from the input text and decide on the accurate relationship between 'Glencore' and 'mining' from the options provided.
Options: industry, brand, legal form, location of formation