IATA says it is aiming for the air transport industry to reach net zero carbon emissions by 2050. The commitment, which would line up with the goal of the 2015 Paris accord to help keep global warming under 1.5 degrees Celsius, was agreed at association’s recent general gathering in Boston, though it was acknowledged that meeting the target would be a “huge challenge.”

The industry appears to be counting heavily on a carbon-offset plan laid out by a UN organization on civil aviation, but suggests governments have a role to play, too.

“With collective efforts of the entire value chain and supportive government policies, aviation will achieve net zero emissions by 2050,” IATA Director-General Willie Walsh said in a statement.

IATA said industry can take steps through use of sustainable fuels, new plane technologies, improved efficiencies, and new power sources like electric or hydrogen power — but carbon capture and carbon-offset programs will also have a role.

Walsh said one scenario foresees sustainable fuels accounting for nearly two-thirds of the roughly 1.8 gigatons of carbon that would need to be mitigated in order for airlines to reach net-zero emissions.

“The aviation industry must progressively reduce its emissions while accommodating the growing demand of a world that is eager to fly,” says IATA, which forecasts that by 10 billion people are expected to fly in 2050.