Register-Guard: The average temperature on Earth could increase by 3.6 degrees by the middle of this century, according to data from climate change researchers in nearly 20 countries. And that increase is enough to potentially affect the main source of Eugene-Springfield's drinking water, according to a study by Oregon State University scientists. The McKenzie River is the major source of drinking water in the Eugene-Springfeld area. The single-digit increase in temperatures predicted worldwide means the snowpacks...