First-Ever CO2 Aviation Emissions Standard The international aviation community is on the cusp of certifying a first-ever carbon dioxide (CO2) emissions standard for commercial aircraft.
Experts on the International Civil Aviation Organization (ICAO) Committee on Aviation and Environmental Protection (CAEP) agreed in February to a CO2 standard that would apply to commercial aircraft types accounting for more than 92 percent of all aviation emissions.
https://www.volpe.dot.gov/news/milestone-aviation-standard-bolstered-by-volpe-assessment