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Leaded fuel has a long history of causing brain damage to kids exposed to the fumes, and it demonstrably does for kids living near airports as a result of propeller planes burning leaded fuel. The recent development of an unleaded fuel which can work in all the existing aircraft fleet has resulted in a small number of locations...

The FAA has issued a final rule that will require most larger aircraft built after Jan. 1, 2028, to meet new efficiency standards designed to reduce their carbon emissions per passenger mile. The new rule will cover all subsonic jets with a maximum takeoff weight of more than 12,500 pounds and turboprops with an MTOW of 19,000...