Describe three methods of land disposal that were used in the 1970s. How has their use changed over time?
What will be an ideal response?
"In the early 1970s, there were three primary land-disposal methods: (1) deep-well injection, (2) surface impoundments, and (3) landfills. With the conscientious implementation of safeguards, each of these methods has some merit, and each is still heavily used for hazardous-waste disposal. Without adequate regulations or enforcement, however, contamination of groundwater is inevitable. The total amount of deep-well injection has declined over the years, from 685 million tons in 1988 to 116 million tons in 2001 (representing 5.4% of on-land disposal)."
You might also like to view...
What process assures that claims made by scientists are reliable?
A. peer review B. federal law C. Supreme Court D. public opinion
Clearly explain how soil erosion, associated with poor agricultural practices, can lead to a decrease in dissolved oxygen in bodies of water
What will be an ideal response
Pacific-type margins are classified as active margins
Indicate whether the statement is true or false
Urban populations consume about ____% of the earth's resources.
A. 20 B. 40 C. 50 D. 75 E. 90