Which of the following statements about current U.S. waste disposal is true?
A. We landfill half of our trash and recycle the other half.
B. We incinerate 90% of our trash and landfill the rest.
C. We incinerate 50% of our trash and the rest is in open landfills.
D. We landfill half of our trash and recycle a third of it.
Answer: D. We landfill half of our trash and recycle a third of it.
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A. underground mining B. resources C. secondary recovery D. renewable energy sources E. liquefied natural gas F. nonrenewable energy sources G. overburden H. surface mining I. passive solar system J. acid mine drainage K. active solar system L. black lung disease M. reserves N. photovoltaic cell O. geothermal energy
List the three major trophic levels in a food web. What types of organisms are found in each level? Where are the autotrophs and heterotrophs found? Discuss the significance of each level for the integral functioning of the food web
What will be an ideal response?
Describe the role of Intergovernmental Panel on Climate Change (IPCC)
What will be an ideal response?
What is the study of life as revealed by fossils?
A)genetics B)paleontology C)classification D)history E)geology