 About a quarter of those plastics will end up as litter, according to Oxford University's Our World in Data, and also take anywhere from 20 years to even as long as centuries to decompose. NPR producer Claire Murashima is accepting the plastic-free challenge. She's planning to go without it for just a week, starting tomorrow. And she joins us now to talk about it. Claire, it's the first I'm hearing of plastic-free July. So where did this idea come from?