Tropical rainforests have thin, acidic soils, yet they contain dense vegetation and high biodiversity. How can these tropical forests have poor soil and support such a diverse array of life?

What does the 1977 U.S. Surface Mining Control and Reclamation Act mandate?

 In subsurface mines, more miners die of ___________

A tropical rain forest has more different kinds of trees than the same area in a boreal forest. Which of the following is true?

With more energy-intensive production methods, the EROEI goes _____, and the cost goes _____.

Approximately what percent of U.S. streams and rivers meet the fishable/swimmable goal?

One of the first environmental laws passed in the United States to regulate pollution was the ___________

How many years are the total world conventional reserves of natural gas are expected to last?

Which policy decision-making step involves a designated government agency, such as the EPA, administering a policy?

Where are the largest conventional oil and natural gas reserves in the world found?