Glencore is facing legal action over pollution caused by its vast and lucrative copper operations in Zambia. Glencore’s Mopani Copper Mines subsidiary has been a thorn in the firm’s side since its £6billion float in May last year, throwing up allegations of environmental recklessness and tax avoidance, which the company denies. The Swiss-based firm could find itself dragged through the courts after Zambian campaign group the Centre for Trade Policy and Development demanded the company explain itself or face a lawsuit.