What was a result of efforts by the U. S. and Canadian governments to improve water quality? Question 11 options:

the resurgence of some fish populations

increased sugar maple production

increased hydroelectric power

a depletion of several salmon species

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

Which barrier to economic development is shown in the following examples? i. the high rate of hiv infection in underdeveloped nations ii. the use of children as soldiers in uganda’s army in the early 2000s iii. low literacy rates in underdeveloped nations with limited exposure to adequate education a. foreign debt b. political instability c. widespread disease d. low levels of social welfare

Seafood watch is a program that identifies sustainably harvested, ocean friendly seafood in order to