UPDATE 1-What deal on CO2 standards means for Airbus, Boeing jets

(Adds timeframe of analysis) Feb 8 (Reuters) - Global aviation leaders agreed on Monday to the world's first carbon dioxide emissions standards for new and existing plane programs starting in 2020, three sources familiar with the matter said. Experts at the International Civil Aviation Organization (ICAO) had been poring over a set of "stringency options" ranging from 1 to 10. These would curb CO2 emissions from large jetliners from 20 percent in the case of option 1 to 40.4 percent i