Which of the following was the primary reason for the beginning of urbanization on the 11th century?
a. indutrialization
b. pollution
c. sustained peace
d. food shortages

Germany's black forest is being destroyed as a result of which environmental issue ?

The most effective way to provide children with safety messages is to

Which of the following policies is an example of a command-and-control policy? a. subsidies to education b. maximum levels of pollution that factories may emit c. tradable pollution permits d. none of the above is an example of a command-and-control policy.