Every Thursday, a new episode of Living Planet brings you environment stories from around the world, digging deeper into topics that touch our lives every day. The prize-winning, weekly half-hour radio magazine and podcast is produced by Deutsche Welle, Germany's international broadcaster - visit dw.com/environment for more.
How clean is our snow? Is it safe to eat for dogs? Scientists have found traces of dangerous substances in Lake Victoria, Africa's biggest lake. And what to do with Fukushima's radioactive water and other nuclear waste in our oceans.