Why isn't the LD50 of a new chemical tested on humans?
A. It cannot be calculated.
B. The LD50 is only for pigeons.
C. Tests are not available.
D. It is unethical to determine the LD50 on humans.
Answer: D
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.