Zero net emissions by 2050: a huge challenge for airline industryThe airline sector is aiming for net zero carbon emissions by 2050, a huge challenge for an industry that currently relies on fossil fuels. The question of "greening" the international aviation sector by 2050 constitutes a colossal task whose stakes -- and sheer numbers -- can make the head spin, according to the airlines themselves. As it stands, the aviation sector produces 900 million tons of CO2 per year, according to IATA. By 2050, if nothing is done to reduce the industry's carbon footprint, that will rise to 1.8 billion tons. Reducing this level to gradually achieve net zero emissions in 2050 poses an enormous technological challenge that the IATA estimates will cost companies around $1.55 trillion between 2020 and 2050.