What would happen if the temperature in the Tundra drops 20 degrees farenheit?
What was it originally? Are you talking about summer temperature or winter?
http://www.google.com/search?client=safari&rls=en&q=tundra+temperature&ie=UTF-8&oe=UTF-8
http://www.google.com/search?client=safari&rls=en&q=tundra+temperature&ie=UTF-8&oe=UTF-8