Only answer if yoou know which of the following is not associated with chinese civilization?
1) the development of a civil service system
2) the development of block printing
3) the inention of aqueducts
4) the invention of gun powder

What major factors play a role in global warming? 1. human activity and normal climate conditions 2. natural factors and human activity 3. normal climate conditions and abnormal human activities 4. abnormal human activities and natural factors

Compare demographic and environmental effects of the columbian

All of the following statements about the biosphere are true except: a. light and heat from the sun do not affect the biosphere. b. the biosphere gets resources from earth's crust, hydrosphere and atmosphere. c. like "biology", the name for the biosphere comes from the greek word for life. d. the biosphere includes all living organisms on earth's surface.