With almost carbon-free operation, electrical vertical take-off and landing vehicles have the potential to realize new net-zero aviation sectors by 2050 In line with being one of the first major US airlines to pledge a 100% green commitment to reach net zero emissions by 2050 without the use of traditional offsets, United Airlines has invested in hydrogen fuel cell engines, sustainable aviation fuel, and most recently, in the conditional purchase of 200 four-seater eVTOLs (electric vertical take-off and landing vehicle) to operate "flying taxis". Under the terms of the US$15m agreement with Eve Air Mobility Systems, the firm intends to study the development, use and application of Eve's aircraft and the urban air mobility (UAM) ecosystem. eVTOL technology relies on electric motors, providing near carbon-free flights for use as air taxis in urban markets. With a range of 100km, Eve's eVTOLs are quieter than conventional aircraft by 90% and offer a sustainable commute.