United unveiled this sustainability goal in December 2020, and aims to achieve this goal using direct emission reduction measures, rather than through the use of carbon offsets. Achieving its net zero goal will require substantial investments in emerging technologies, ranging from Direct Air Capture to sustainable aviation fuel (SAF). Since unveiling its commitment late last year, United has made several announcements aimed at helping the airline improve its emissions profile and to foster a more sustainable aviation industry, including the launch Eco-Skies Alliance, a program aimed at enabling corporate customers the opportunity to reduce the environmental impact of travel beyond purchasing offsets, by paying the additional cost of SAF, and in February, United announced an agreement with electric vertical takeoff and landing aircraft (eVTOL) developer Archer to assist in the development of battery-powered, short-haul aircraft.