After 200 million years, only 1/16 of the original amount of a particular radioactive waste will remain. The half-life is this radioactive waste is how many million years?
Answer: 50
Environmental Science
- Which of the following criteria will not help in the development of a sustainable global environment?
- James Lovelock and Lynn Margulis are noted for:
- The maximum number of owls that can live in a certain forested region is defined as the _____________ for that species in that environment.
- If we can continue to harvest the same number of tuna from the Pacific Ocean for the foreseeable future, we would have achieved ____________ of that resource.
- A large decrease in the human population occurred around 1350 A.D. What was the cause of that decrease in population?
- According to Frederick Law Olmsted, planting vegetation in cities provides:
- Ecological justification is related to:
- "Famines in Africa illustrate that population crises feed on themselves." Which of the following arguments supports this quotation?
- Two arguments that justify human interaction with nature, by placing human survival above all other considerations are:
- The question "Which is more important, the survival of people alive today or conservation of the environment?" is difficult to answer. Answering this question demands:
- What is the carrying capacity of the Earth for humans?
- Aspects and limitation(s) of the early approach to environmental issues included:
- The use of renewable environmental resources faster than they can be replenished would be considered:
- The Precautionary Principle:
- Beyond a threshold world population of about ________, the quality of life declines.
- Which of the following is not a major theme of environmental science?
- The Gaia Hypothesis states that the dominant force that has shaped the global environment through time is:
- When did the most dramatic increase in the history of the human population occur?
- Throughout history, the human population:
- According to the Environmental Science text, the underlying issue underlying all environmental problems is:
- According to the Environmental Science text, the environmental statement of the 1990's was "saving our planet." Is Earth's very survival really in danger?
- Justification that is based on the value of some factor that is essential to larger life support functions, even though it might not benefit an individual directly:
- Justification that has to do with the belief that various aspects of the environment have a right to exist:
- Justification that argues to preserve some aspect of the environment because of our appreciation of the beauty of nature and our desire to get out and enjoy it:
- According to the Environmental Science text, nearly 6 million children die each year due to the effects of: