Diane Rehm Show: Since the beginning of May, a massive, out-of-control fire has been raging in boreal forest lands in Alberta, Canada. The fire forced the evacuation of more than 80,000 residents of Fort McMurray and halted oil sands production. Scientists say climate change has contributed to the growing number and severity of wildfires in the worlds boreal forests. Hot, dry weather has lengthened fire seasons and created ideal conditions for wildfires. The fires in turn increase emissions of greenhouse gases....