Advocates descended on the streets of Glasgow last month, pressing banks and other financial institutions at 26th United Nations climate summit to be more responsible stewards of the climate. But a bank based just 50 miles east of the Scottish city is already showing what that might look like.NatWest, formerly the Royal Bank of Scotland, has made the unlikely transformation from substantial financier of the oil and gas industry to a leader in green finance, whittling down its fossil fuel exposure and pledging to funnel 100 billion pounds, or $133 billion, into sustainable-energy projects in the next four years.The bank, with headquarters in Edinburgh, could serve as an example of the huge shift necessary for Britain’s banking and investment sector to become …
