The low-cost carrier said it had contracted all its sustainable aviation fuel needs for the next five years from its supplier Q8Aviation, while it was also investing in technology to optimise the descent of its aircraft.
The new measures follow its fleet upgrade programme using fuel-efficient Airbus A320 NEO aircraft, and a partnership with engine maker Rolls-Royce to test the use of hydrogen in turbofan engines.
Chief Executive Johan Lundgren said: "We believe this is doable. We recognise it is ambitious as well."
He said the carbon-offsetting programme launched in 2019 was always an interim measure until new technology to reduce the airline's own emissions started to come on stream.
"If you go out and ask the public in general, they would say that the best way to decarbonise the industry would be through this zero-emission technology and that is what we are now putting more attention on to," he told reporters at the company's headquarters at Luton Airport, north of London.
(Reporting by Paul Sandle; Editing by Kate Holton)