Business Green: Campaign group WWF will today advise the government that it could slash carbon emissions and save up to £100m by cutting the number of flights taken by civil servants over the next three years. The prediction forms the centrepiece of a new report, Excess Baggage: The case for reducing government flying, which argues that if the government followed its own recommendation that people avoid short haul flights that could be replaced by rail, it could cut the number of flights by 600,000, …