1. If a decision is made to implement recycling measures, what would be considered a disadvantage?
A) reduces waste to landfills
B) not always cost effective
C) reduces energy consumption
D) conserves natural resources
2. Black smoke rises in the air from a factory in Georgia. The black smoke is a pollutant. 2. When this pollutant returns to Earth it becomes acid rain. How does acid rain change the plants' and animals' environment?
A) It helps clean up the pollution.
B) It helps them build a new habitat.
C) The plants and animals are harmed.
D) It adds nutrients to the environment.

3. Global population is expected to increase by three billion or more over the next 50–75 years, and the number of people living in urban areas will more than double. Most of the world's population growth will occur in developing countries. More than 1 billion people do not have access to safe and affordable drinking water. In fact, inadequate drinking water quality is a leading cause of infant mortality worldwide. What proposed solution may help with this problem?
A) increased storage facilities for clean water
B) decrease the number of motor vehicles sold in the United States
C) development of newer, faster methods to protect endangered species
D) give more money to poor countries without increasing education