Business Green: Just a week after announcing its support for industry wide plans to halve aviation’s carbon emissions by 2050, British Airways (BA) has been accused of hypocrisy after launching a new twice-daily business service between London City Airport and New York with just 32 seats. This morning’s inaugural flight was marred by protests from the Plane Stupid lobby and prompted accusations from green groups that the company was already failing to live up to chief executive Willie Walsh’s …