European opposition to immigration primarily relates to A) unauthorized immigration. b) increased cultural diversity. c) insufficient natural resources. d) rapid overpopulation and crowding. e) the expansion of crime and unemployment.

The european union was formally established in

Ozone in the upper atmosphere has been depleted by a. sulfur dioxide. b. chlorofluorocarbons. c. carbon dioxide. d. oxygen.

The us and canadian governments are doing all of the following to combat environmental problems except a. encouraging the use of public transportation b. enacting clean water policies c. requiring emissions testing d. limiting animal populations in some regions