Some contacts of ours (ex-girlfriends and cops) are writing with reports of unseasonably hot weather in Beijing. We like getting these emails, partly because it's nice to keep in touch with old flames, and partly out of schadenfreude. But warmer weather isn't just a Beijing phenomenon, and there's a lot of talk about global warming in urban Chinese society these days. Here's a podcast about how to join a discussion about it in Mandarin Chinese.