Ex-BA boss: drop green aviation policies if costs outweigh benefits

Willie Walsh, now boss of Iata, also calls for more investment in sustainable aviation fuels

Green aviation policies should be abandoned if the costs outweigh the benefits, the head of the world's most influential airlines body has said.

Willie Walsh, the director general of the International Air Transport Association (Iata) and a former British Airways boss, said achieving net zero by 2050 was existential, not optional".