Lead Enters Drinking Water Primarily from

Q2: Wastewater treatment sludge, after reduction to about

Q3: Eutrophication is the<br>A)overgrowth of algae in lakes

Q4: Groundwater (from wells), unlike surface water, can

Q5: Groundwater (from wells) may contain<br>A)salt from use

Q6: Mercury poisoning can occur from consuming fish

Q8: The recovery zone of polluted natural waters

Q9: Acids can enter natural waters due to<br>A)industry,

Q10: Lakes generally evolve naturally over time in

Q11: Cold, clear lakes or streams with few

Q12: Water pollution can be<br>A)biological<br>B)chemical<br>C)biological or chemical<br>D)visible but