Which of the following claims is the narrowest in scope? So-called "global warming" is simply an example of normal swings in the Earth's climate and is not
caused by human activity,
Global warming is the most important crisis facing humanity and can be addressed only with
concerted worldwide effort.
Among the effects of global warming are drought in the southwestern United States, the melting of
glaciers and polar ice, and more violent storms worldwide.
The Science Education Resource Center should fund lectures open to the public on global
warming.