Problem 6
Where is most of the trash in the United States disposed of? A) recycling centers B) landfills C) hazardous waste sites D) compost piles
Problem 6
Which of the following describes how the human population on Earth changed during the last 50 years? A. It decreased. B. It increased. C. It didn't change. D. It first increased, then decreased.
Problem 7
Between 1960 and 2000, world population increased by how many billions of people? A) \(5.9\) C) \(1.0\) B) \(4.2\) D) \(3.1\)
Problem 8
Which of the following is a substance that contaminates the environment? A) compost C) pollutant B) development D) groundwater
Problem 9
List three ways that people affect the environment.
Problem 9
Which of the following might be poisonous, cause cancer, or catch fire? A) enzyme B) compost C) metals D) hazardous waste
Problem 10
What do we call an object that can be processed so that it can be used again? A) trash C) disposable B) recyclable D) hazardous
Problem 10
How does unnecessary packaging increase the amount of solid waste? How can this waste be reduced?
Problem 11
Why are many people concerned about the loss of tropical forest?
Problem 11
What is about 40 percent of the mass of our trash made up of? A) glass C) yard waste B) aluminum D) paper
