Worries about investment and cost are stalling progress.

No-fly zones in Europe and the Middle East are making planes travel further and burn more fuel.

Claims of sustainability or low-carbon flying are being challenged in court.

Airlines are promising net-zero emissions by 2050. To get there, they’re experimenting with used cooking oil, ag waste and corn ethanol in their fuel tanks. But that alone won’t be enough.

Reducing jet fuel consumption by 2.5% each year could halt aviation’s growing influence on climate change.

When planes fly from east to west, they are flying against a river of air called a jet stream. These air currents can make your flight longer or shorter, depending on which way you are going.

A precedent set at the industry's outset has dominated efforts to reform aviation.

As policymakers weigh financial aid for the airline industry, they have an opportunity to help make the US organ transplantation system more equitable at the same time.

Carbon offsetting is better regulated than it once was, but it's no solution to the climate crisis.

Any bailout should include conditions that the airline reach net-zero carbon emissions by 2050.