Science & technology| Hunt for the red-hot October
Climate change may make it harder to spot submarines
The sound of their engines will not travel as far
Navy submarine
Photograph: U.S Navy photo
THE PENTAGON “does not do climate-change crap”, said Pete Hegseth, Donald Trump’s defence secretary, on March 9th. “We do training and warfighting.” Fair enough. But a new NATOstudy illustrates how closely the two are linked.