Business Green: Passengers will have to bear the weight of fare increases if airlines join a global emissions trading scheme, British Airways (BA) boss Willie Walsh said in an interview with The Times. Walsh said fares would have to rise to cover the cost of a global trading scheme, citing the sector’s unsustainable financial state, with a total loss of $9bn (£5.5bn) forecast this year. “This will add billions to the industry’s cost base and airlines are unlikely to be able to absorb the cost. …