Last year it was magic sneakers that can tone your butt. Now, against a drumbeat of apocalyptic climate news, it’s products that will protect you from the sun: “UV protective” tank tops (and bikinis!), toddlers’ watershoes with SPF protection, “climate control” shampoo, and on and on. A lot of these products do contain chemicals like titanium dioxide or zinc oxide that reflect sunlight. Others not so much. And how much sun protection does a person not living in the Sudan really need? My article in the National section of the NYTimes, New Breed of Products Said to Offer Sun Protection, but Doubts Linger.