Business Green: It is not just small businesses and cash-strapped first-time buyers who are struggling to get bank loans at the moment. Some of the world’s most polluting companies could also find financing increasingly difficult to come by, after two of the world’s largest banks said that they would cease lending to some of their more environmentally damaging clients. Bank of America (BoA) and HSBC have this week backed up their commitment to green investment guidelines by announcing that they are …