Commercial jets delivered by Boeing Co (BA.N) last year will account on average for emissions equivalent to 1 million tonnes of carbon dioxide each over their 20-year-plus lifespans, a new report from the planemaker shows.

Boeing is the latest company to report so-called Scope 3 emissions that result when customers use their products, amid pressure from investors and climate activists for data on how companies are performing on limiting their environmental impact.

The report sheds further light on the task facing global aviation as it faces calls by environmental groups for curbs to air travel and growing political pressure to cut emissions, after Europe's Airbus (AIR.PA) issued similar data in February.

Together, the world's two largest planemakers in 2020 delivered jets estimated to be responsible for total emissions equivalent to 600 million tonnes of CO2 over their lifetimes, a figure dampened by lower deliveries during the pandemic.

Aviation produces up to 3% of man-made CO2 emissions and 12% of CO2 from transport, the industry says. It has pledged to reduce net carbon emissions to 50% of...