Conflicting priorities: The cost of cobalt, dealing with deer in Scotland & fighting heat and air pollution in India's slums

On Living Planet this week, too many deer in the Scottish Highlands are leading to community disputes over how to deal with them. As India works to clean up its air, scientists have realized there may be a surprising trade-off: even higher temperatures. And we venture into the heart of the humanitarian disaster that is cobalt mining in the Democratic Republic of Congo with author Siddharth Kara.