31. Which type of mining has the least surface environmental impact?
32. What does the term �carrying capacity� refer to in environmental geology?
33. Which technology helps in detecting underground contamination?
34. What is the primary purpose of soil testing before construction?
35. Which of the following practices helps reduce geological hazards during urban development?
36. What is the most common source of urban groundwater contamination?
37. Which of the following is a non-renewable resource that environmental geology focuses on preserving?
38. Acid mine drainage primarily results from the oxidation of which mineral?
39. What is the main environmental concern with hydraulic fracturing ("fracking")?
40. What role does a geological engineer play in landfill site selection?
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