A new generation of engines being developed by the world’s largest jet engine maker, CFM (a partnership between GE and Snecma of France), will allow aircraft to use about 15 percent less fuel—enough to save about $1 million per year per airplane and significantly reduce carbon emissions.
via Pocket http://www.technologyreview.com/news/514656/a-more-efficient-jet-engine-is-made-from-lighter-parts-some-3-d-printed/