The current world population is approximately:
China, India, US
Which countries (in order) have the highest population?
Which gas makes up the largest portion of the Earth's atmosphere?
Ground level ozone
The combination of nitrogen oxides and hydrocarbons in the presence of sunlight causes:
In the last 30 years, ambient levels of carbon monoxide and lead in the U.S. have:
the use of CFC's (Freon)
The ozone "hole" is a result of:
What does stratospheric ozone protect us from?
spring, above Antarctic
When and where is ozone depletion worst?
Naturally occurring rain is:
Which US region has experienced the worst effects of acid rain?
How much of US energy comes from non-renewable fuels
Most electricity in the US is generated from what source of energy?
In North Carolina, what is the largest component of water pollution?
What is the largest source of pollution in North Carolina's waterways?
Cape Fear River
What river basin is Chapel Hill in?
Medical X-rays and diagnostic tests
The major souce of anthropogenic radiation exposure for most Americans is:
Stored on site where it is generated
How does the United States dispose of its nuclear waste? It is:
Loss of habitat
What is the most common reason for extinctions of other species?
Put in landfills
What happens to the majority of household garbage once it leaves homes? It is:
The largest component of household garbage is: