Dr. Stone talked about temperatures, and about how temperatures amplify warming in the high latitudes in the Arctic. Another key issue, of course, is water. There's quite a solid understanding as to what will happen in terms of projected changes in precipitation.
For Canada, it means actually an overall enhanced likelihood of precipitation but also, at the same time, an enhanced likelihood of drought. So when it rains, it rains in increasingly likely bigger events, coming in the winter, and there's an increased likelihood of drought.
At the same time, we know that our friends to the south, in the southern U.S., are going to experience less rain overall and an increased likelihood of drought.
This poses a real predicament in terms of water availability in North America, with Canada getting more throughout the year and the subtropical regions, including the southern U.S., getting less. Currently it's a real problem, of course, because they're draining the Great Plains aquifer at about 40 times the rate it's being replenished.
So there will be, in North America, water crises this century.