Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
Cash machines are as dirty as public toilets.
175
Sunflowers can be used to clean up radioactive waste.
17
A portion of the water you drink has already been drunk by someone else, maybe several times over.
170
In a year approximately 900 million trees are cut down to make the raw materials needed for American pulp mills and paper.
-16
The number of text messages sent and received in a given day is greater than the world's population.
198
The average person eats almost 1500 pounds of food a year.
157