Which substance is one of the top five toxic substances in terms of human and environmental health?
A. lead
B. formaldehyde
C. tobacco smoke
D. DDT
E. nitrous acid
Answer: A
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Which of the following are health problems that can be caused by ozone?
a. skin cancer b. reduced resistance to colds and pneumonia c. nervous system disorders d. Mutations e. stomach cancer
The soils in the central part of the United States used for growing wheat, corn and soybeans are classified as ________ soils
A) forest B) rainforest C) grassland D) desert E) wetland
What is the ecological footprint and what does it tell us?
a) The ecological footprint captures carbon emissions. It tells us about global warming. b) The ecological footprint is an analysis that converts various demands into area. It tells us that we are currently using 1 Earth. c) The ecological footprint is an analysis that converts various demands into area. It tells us that we are currently using 1.5 Earths. d) The ecological footprint analyzes different types of energy production. It tells us what percentage of energy we consume from different sources.
Oil and natural gas originate from ________ in marine sediments.
A. comet impacts B. coal C. organic matter D. peat E. the earth's interior