Which of the following is causing widespread concern?
A) As atmospheric oxygen levels decline, the ozone layer is being destroyed.
B) As atmospheric carbon dioxide levels decline, the ozone layer is being destroyed.
C) As levels of methane decline, average global temperatures are increasing.
D) As levels of carbon dioxide increase, average global temperatures are increasing.
Question 2
Insecticides would be most useful in combating
A) mosquitoes that spread malaria.
B) weeds that infect our agricultural fields.
C) bacteria, such as Salmonella, which sometimes contaminate meat.
D) fungi that contribute to molds and mildew that lead to respiratory infections.
The oxygen isotope curve illustrates the ratio between 16O and 18O.
This lithograph by Currier and Ives gives an erroneous impression of the “battle.” Major Robert Ande
How Oxygen-16 Becomes More Concentrated in Glacial Ice
Carbon dioxide: The anthropogenic greenhouse gas of primary concern
Coastal sensitivity to rising sea levels
An overview of the levels of organization in nature