A common form of extracting gold from rock used in Australia and North America is
a. power flushing
b. cyanide heap leaching
c. sulfuric acid leaching
d. hydraulic scouring
e. yellow-cake extraction
Answer: B
AP Environmental Science
- One way to reduce indoor air pollution in developed countries, especially VOCs, is to do which of the following?
- According to environmental scientists, all of the following are deficiencies of the U.S. air pollution control laws, except
- According to a 2007 EPA report, between 1980 and 2006 the combined emissions of six major air pollutants decreased by how much?
- National ambient air quality standards
- How many people are thought to die prematurely because of air pollution caused by ocean-going ships that dock at U.S. ports?
- In the United States, how many people get cancer from breathing diesel fumes from buses and trucks?
- The people least vulnerable to air pollution are
- In 1988, the EPA and the U.S. Surgeon General recommended that everyone living in a detached house or the first three floors of an apartment building test for radon. By 2004, ______% of all households had tested for radon.
- On average, radon levels should be monitored continuously in the main living areas of houses for ___.
- Radioactive ____ is a product of uranium decay and an indoor air pollutant.
- Respiratory illnesses in developing countries are most likely to be caused by
- Exposure to indoor formaldehyde pollution is least likely to cause
- Furniture stuffing, paneling, particle board, and foam insulation may be sources of
- All of the following are on EPA's "four most dangerous indoor air pollutants list," except
- Sick Building Syndrome is linked to all of the following, except
- Of the following, the least vulnerable to air pollution are
- Experts rate indoor air pollution as a
- Of the following strategies to reduce acid deposition, the least effective is probably
- Approximately ___ % of China's cropland suffers from excess acidity.
- Acid deposition has been linked to
- In general, acid deposition has harmful effects for terrestrial ecosystems when it falls below a pH level of
- Experts rate acid rain as a
- Acid deposition is best classified as a
- Typical rain in the eastern United States has a pH of
- Acid deposition is properly defined as the ____ deposition of ____ pollutants onto earth's surface.