What is servirity?

Describe the rise of civilization in the americas or the spread of civilization to peripheral regions in africa and asia? Where do people go if they get deported? What is the wage scale for a union carpenter in Maryland? What is indirect censorship? How did immigration effect big business? Is order and harmony should begin in the inner nature of man? Why is it impossible to stop pollutions? What are two ways to get the most out of nonrenewable resources? How long is the 1990 clean air act? How did people live in the 1920s? Can maglev train built underground? How does conserving energy help control air water and land pollution? What rights do individuals have to be protected from danger and harm? What are steps taken by consumer groups? Which of these can be caused by humans changing the environment? One has more influence over the other? What resource can be replaced at a sustainable rate? Is law necessary? What is sandhi? Why rain is acidic?