If you want something, just ask — even when it comes to emissions reductions in the commercial aviation industry, apparently. Airlines could reduce their emissions, save a ton of fuel money, and promise cheaper flights to its passengers simply by asking their pilots to ease up a little on the gas pedal.

A new behavioral research study, published by the National Bureau of Economic Research, reported jumps in fuel efficiency after plying pilots with simple incentives, such as providing monthly feedback on how much fuel they’ve conserved on flight.

The experiment — carried out on Virgin Atlantic Airways — was so effective that it “outperforms every other reported carbon abatement technology of which we are aware,” write the economists who executed the study. Across 40,000 flights over eight months, pilots reduced carbon emissions by 21,000 tons and fuel costs by $44 million. A win all around!