Lebanon has made efforts to preserve its famed "cedars" forestlands in recent years
Indicate whether the statement is true or false
TRUE
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What is an advantage of sanitary landfills for the disposal of solid waste?
A. discouragement of waste production B. low operating cost C. containment of greenhouse gases D. less contamination of groundwater E. better traffic ad air pollution controls
According to the diagram, the number of plants in operation ________ in the early 1990s.
A. Leveled off B. Increased sharply C. Increased D. Decreased sharply E. Decreased
Why are bays and estuaries especially sensitive to pollution?
A) The water is stagnant. B) Fresh water can be polluted more easily. C) Few bacteria are present to aid with biodegradation of pollutants. D) Pollution flows out with river water or is released directly by industry in busy ports.
Smelting of iron ore involves ________
A) washing the ore with acid to extract iron B) oxidizing iron to ferric oxide and then adding silicon and boron C) dissolving the ore in hot water to separate iron and aluminum D) heating the ore beyond iron's melting point and combining the material with carbon E) crushing and heating the ore to its melting point