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Letters to the editor Chemistry demonstrations I read the article on the American Chemical Society’s new strategy (C&EN, Jan. 13, 2025, page 41) and noticed that one of the new core values is passion for science. One way of encouraging a passion for science is to watch chemistry demonstration shows. Watching live demonstrations or recorded ones can increase student interest in chemistry and science. The recording of a 90 min chemistry demonstration show I did with J. J. Fortman is available on my website (www.rubinbattino.com) in the “Chemistry Presentations” section. Rubin Battino Yellow Springs, Ohio Safety and engineering issues with hydrogen I read with great interest your article titled “Drilling for Hydrogen” in the March 17 issue of C&EN (page 23). However, I was surprised that the article did not discuss some of the safety and engineering issues associated with using hydrogen as an energy carrier. First, the volumetric heat