Business Green: Shell will come under fire from shareholders and environmentalists tomorrow over executive pay, polluting gas flaring and alleged human rights abuses in Nigeria. The annual general meeting in London will see a rebellion from investors angry that the board has used its discretion to award bonuses despite the company’s failure to meet pre-set targets. The Association of British Insurers has issued an “amber top” alert to its members about its concerns while one of the top 10 …