Guardian: Channel 4 Channel 4 accused of misleading contributors to green documentary Adam Werbach says he was not informed of the polemical nature of the programme, and that his opinions are not accurately represented An environmental documentary due to be broadcast on Channel 4 on Thursday evening has come under attack from a leading American environmentalist who was interviewed for the programme, as well as a coalition of anti-GM campaigners based in the developing world. Adam Werbach, a California-based…