Many people think ethical investments are a worthy but inconsequential sideline away from the business of making big money – an indulgence for do-gooders. But the example of the second largest sovereign wealth fund (SWF) in the world, after Abu Dhabi's, may give them food for thought. Norway's Government Pension Fund, worth a dizzying £203bn, frequently flexes its ethical muscles. [refers to Wal-Mart, BAE Systems]