Slashing plane emissions a lofty goal, but progress elusive

The aircraft industry is facing growing criticism over greenhouse gas emissions that are set to soar as more people take to the skies, but experts say game-changing technology for cleaner planes is still decades away.

What commercial aircraft will look like in 2050

The aircraft industry is expecting a seven-fold increase in air traffic by 2050, and a four-fold increase in greenhouse gas emissions unless fundamental changes are made. But just how "fundamental" will those changes need ...

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