Science & technology | Hunt for the red-hot OctoberClimate change may make it harder to spot submarinesThe sound of their engines will not travel as farPhotograph: U.S Navy photo Mar 27th 2025THE PENTAGON does not do climate-change crap, said Pete Hegseth, Donald Trumps defence secretary, on March 9th. We do training and warfighting. Fair enough. But a new NATO study illustrates how closely the two are linked.Explore moreThis article appeared in the Science & technology section of the print edition under the headline Hunt for the red-hot OctoberFrom the March 29th 2025 editionDiscover stories from this section and more in the list of contentsExplore the editionReuse this content