Over the Northern Hemisphere, the period from 1983 to 2012 was likely the warmest 30-year period of the last ____ years, according to the IPCC.
a. 100
b. 300
c. 1,400
d. 2,000
e. 10,000
Question 2
The Viking colony in Greenland perished during the ____.
a. Pleistocene epoch
b. climatic optimum
c. Little Ice Age
d. Younger Dryas
e. Blling-Allerd period