claim: 43% of CO2 from commercial aviation was linked to passenger movement in narrowbody aircraft, followed by widebody jets ( 33% ), and regional aircraft ( 5% ).
evidence: Today, turboprop aircraft – probably in part because of their lower cruising speeds and altitudes ( similar to the earlier piston-powered airliners ) compared to jet airliners – play an obvious role in the overall fuel efficiency of major airlines that have regional carrier subsidiaries.