What event was an important cause of the surge of immigration to European countries such as Germany since the beginning of the 1990s?
A) the release of the last German colony in Africa in 1989
B) the expulsion of many foreign-born immigrants from France
C) an environmental disaster in the Balkans
D) Germany's mild climate
E) the collapse of the Soviet Union
E
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To help understand and visualize the extent and intensity of the human impact on the earth, some scientists use the concept of the human (or ecological)
A) analysis. B) convergence. C) footprint. D) region. E) settlement.
One contributing factor of the declines in many frog species is that frog eggs have ____.
A. shells that prevent frog embryos from hatching easily B. shells that are permeable to water pollutants C. no shells to protect from embryos from predation D. no shells to protect frog embryos from dehydration E. no shells to protect frog embryos from water pollutants
What is the best description of activities of the secondary sector?
A) assembling raw materials and manufacturing B) extraction of materials from the earth C) provision of services, including wholesaling and retailing, and transportation D) management of information E) none of the above
Acid rain is an example of ________ deposition
A) dry B) wet C) aerosol D) photochemical E) industrial