WHEN AID donors helped fund the Mozal aluminium smelter in Mozambique, the objective was to assist that southern African nation construct up its financial system after a civil conflict. In a rustic with revenue per head of simply over $600, the Mozal smelter is the most important industrial employer. But now the lofty intention to assist poor nations develop dangers falling foul of wealthy nations’ urge to decarbonise their economies and shield home manufacturing.