During World War II when raw materials were scarce, what percentage of paper was recycled in the USA?
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.
If you haven’t done so already, please register for our newsletter by clicking here
Click here for terms & conditions.