Poor inner city children are exposed to lead toxicity primarily from ________.
A) uptake from soils into food plants B) by atmospheric deposition on plant leaves
C) eating soil and dust D) lead containing paint on toys
Question 2Except for a very small number of accidental spills, pesticides used in agriculture have not yet been found to contaminate actual groundwater wells.
Indicate whether the statement is true or false
Question 3In the design of a ________ type landfill, evapotranspiration by cover vegetation should be maximized.
A) natural attenuation B) containment
C) both A and B D) neither A nor B
Question 4Hyperaccumulators are plants that ________.
A) are extremely sensitive to the toxic effect of certain heavy metals and therefore act as an early warning system to detect contamination
B) can survive on metal-contaminated soil by growing without taking in too much of the metal in question
C) take up extremely high amounts of certain metals without being harmed
D) accumulate dense root mats just above the layer of polluted soil
E) none of the above
Question 5Of the following metals often found in sewage sludge, which would most likely become toxic to farmers' crops if sludge applications exceeded the recommended amounts.
A) Cu B) Cr C) Hg D) Pb E) Cd
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