In this week's issue of our environment newsletter, we look at the greenest ways to dispose of old clothes, check out a hot experiment in the Arctic tundra and find out whether we still really need humans in fire towers to watch for wildfires.
Technology can detect wildfires Do humans still have to? cbc.ca - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from cbc.ca Daily Mail and Mail on Sunday newspapers.