On this day in 1987 many nations of the world came together and agreed to the Montreal Protocol, an international treaty intended to stop the depletion of the planet’s ozone layer. The hole in our ozone layer was growing due to chemicals like CFCs, and if something hadn’t been done we would have faced disastrous consequences. Our ozone layer is slowly recovering thanks to global efforts that were quickly taken once scientists had confirmed the cause of the issue. In the case of global warming, consensus has been much more difficult to reach. International efforts have been far less coordinated on this issue and action has been slow in coming. Why do you think we are treating the threat of global warming differently than that of ozone depletion?