August Quiz Question: Energy

It is extremely likely that human activity caused how much of the observed increase in global average surface temperature from 1951 to 2010?

A. One quarter

B. More than half

C. Seventy-five percent

D. All


Submit your answer in the comments below for your chance to win a prize worth £25!

The entry period is from 6th August  2014 to 5th  September 2014.

All entries must be received by midnight on 5th  September 2014.

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