You must think of the planet Earth as your own body. Visualize: With a one-degree temperature rise in your body, you'll already have the beginnings of the flu. If it goes up by four or five degrees, you'll probably have a serious case of pneumonia or some other rather major ailment. A few more degrees and your brain will stop functioning. Towards the end of the century you can see that there is a very, very serious case of temperature warming, and that is equivalent to pneumonia in your body. One would see a spread of disease vectors in areas where they have never been before, and that is a direct impact on human health. There's also the food -- temperature [of] water will impact the food supply system, so there is an expectation that a lot of people will be stressed for food resources.