Please answer all questions

1		Historically, the highest priority in environmental health was controlling:
			A)	infectious diseases.
			B)	air pollution.
			C)	population growth.
			D)	energy waste.
2		In 2000, world population was about
			A)	500 million
			B)	1 billion
			C)	6 billion
			D)	12 billion
3		Which of the following is a disadvantage of a landfill?
			A)	It becomes unstable when decomposition occurs.
			B)	Buried chemicals leak into the soil.
			C)	It is often a breeding ground for infectious diseases.
			D)	All of the above.
4		The increase in the concentrations of greenhouse gases is primarily the result of:
			A)	the release of CFCs.
			B)	energy use in the developed world.
			C)	heavy metal contamination.
			D)	temperature inversions.
5		The ozone layer protects the earth from excessive:
			A)	radon exposure.
			B)	nuclear radiation.
			C)	ultraviolet radiation.
			D)	chlorofluorocarbons.
6		Which one of the following is a major source of acid precipitation pollutants?
			A)	air conditioners
			B)	lead-based paints
			C)	synthetic building materials
			D)	industrial combustion of coal
7		Lead poisoning is a serious problem among children who:
			A)	live in older buildings.
			B)	had low birth weights.
			C)	have not been vaccinated.
			D)	have poor diets.
8		All of the following strategies can help reduce chemical pollution and its health effects EXCEPT:
			A)	burning your trash.
			B)	buying locally grown and/or organic produce.
			C)	eating less meat.
			D)	trying to buy the least toxic products available.
9		A radioactive gas found in certain soils and rocks is:
			A)	lead.
			B)	asbestos.
			C)	ozone.
			D)	radon.
10		Which of the following is NOT a possible effect of exposure to excessive noise?
			A)	higher blood pressure
			B)	higher blood cholesterol
			C)	deafness
			D)	tinnitus