A United Nations body has agreed to a long-term aspirational goal for aviation of net-zero emissions by 2050, despite challenges from China and Russia, as countries aligned overwhelmingly with airlines amid pressure to curb pollution from flights. Nevertheless, environmentalists criticised the non-binding nature of the agreement as toothless. The decision, described as a compromise by several European countries who wanted a more ambitious target, was met with applause by members at the 193-nation International Civil Aviation Organization’s (ICAO) assembly, held every three years. China, backed by Russia and Eritrea, questioned…