You must have noticed that portable fans are everywhere right now: on sweaty commutes, in stuffy meetings, and at shadeless sporting events. As the hot weather continues, neck fans, handheld electronic fans, and fans that spritz water are selling out fast.
But even if you can get your hands on one, they come with drawbacks: electric designs consume energy; they can run out of battery. And most are made from plastic, with concerns over how many poor-quality models will end up in landfill once the summer’s over.
