 Good morning. I'm Steve Inskeep. South Korea's highest mountain faces an environmental threat. Not climate change, but instant ramen. Hikers on Hollison are taking their trash with them, but only after pouring out the leftover broth. Officials worry that salty liquid damages wildlife and streams, so they want explorers to use half the normal amount of water when boiling their noodles and save the planet with less slurping. It's Morning Edition.