United Airlines? How can they be carbon free ever? Are they exchanging planes for electric cars?
It’s all just happy fluff nonsense. They’ll announce they are carbon free because for each jet that flies from LA to NY, they’ll be planting 100,000 trees in the Amazon.
On a serious note, who knows what technology will be available in 2050?? Maybe large suitcase size fusion power plants that can power 4 jet size electric engines. 30 “technology” years from now is a long, long, long way off.