Motor vehicles produce more air pollution than any other single human activity.
one full commuter bus can mean less cars going through your neighbourhood.

a) 10
b) 20
c) 40
d) 60

What would have happened to portugal’s trade if they had not found a way to sail around the tip of africa

In a class of 20 students, what democratic form of governance makes the most sense

Why are young eastern european democracies at an increased risk for turmoil during a global recession? a) anger against increased democracy b) failure of the free market system c) government corruption d) lack of from the e.u.