Reuters: China, the United States and Europe all pledged support on Saturday for a new deal to curb carbon dioxide emissions by airlines which is due to be finalised at a meeting of the UN's International Civil Aviation Organisation (ICAO) in September and is expected to go into effect from 2021.
Aviation was excluded from last December's climate accord in Paris when countries agreed to limit the global average rise in in temperatures to "well below" 2 degrees Celsius (3.6 degrees Fahrenheit) above pre-industrial...