When you camp in Yosemite and other parks with bears, you can’t just leave your food out on the picnic table or in your car overnight. Anything with a scent has to be stored in bear-proof containers: bear lockers for car-campers, bear canisters for backpackers. Along with reporter Marissa Ortega-Welch, I found out: this problem of bears wanting to eat human food, it’s a problem we humans created.