Earth Hour, WWF's epic switch-off-yer-lights-athon, is a Very Good Thing, right? Well, maybe not…Also this week, BP's political donations smell as bad as you'd expect and Dave adds his customary cloud to apparently sunny news from Costa Rica.Sustainababble is a weekly podcast for and by greeny types who don’t really know what’s going on. It comes out every Monday.Music by Dicky Moore from Bearcraft.Available on iTunes, Stitcher, Soundcloud, and on the sustainababble website. Visit us at @thebabblewagon and at Facebook.com/sustainababble