1. What does destruction refer?

197. What is the main reason for the emergence of smog in large industrial cities?
A) strong wind
B) space dust
C) low temperature
D) temperature inversion
E) radioactive contaminants
198. How many basic steps are included in the environmental risk assessment?
A) 2
B) 3
C) 5
D) 6
E) 4
199. 
What thought to mean «Dose-response assessment»?
A) Determining the concentration of a contaminating agent in the environment and 
estimating its rate of intake in target organisms; for example, finding the concentration of 
aflatoxin (a fungal tox
in) in peanut butter and determining the dose an ‘‘average’’ person 
would receive.

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B) Estimating the potential impact of a hazard based on the severity of its effects and the 
amount of exposure.
C) Quantitating the adverse effects arising from exposure to a hazardous agent based on 
the degree of exposure. This assessment is usually expressed mathematically as a plot 
showing a response (i.e., mortality) in living organisms to increasing doses of the agent.
D) Performing cost/benefit analyses of contaminated-site cleanup or treatment options 
(including treatment processes to reduce exposure to pathogens)
E) Defining the hazard and nature of the harm; for example, identifying a chem- ical 
contaminant, such as lead or carbon tetrachloride, and documenting its toxic effects on 
human beings.
200
. When was Ecosystem” first coined?
A) 1866
B) 1912
C) 1879
D) 1920
E) 1935
201. Which line indicates the main problems of sustainable urban development?
A) environmental safety, deterioration of transport services, satisfaction of social and 
domestic needs
B) rational development of engineering structures, environmental safety, insufficient level 
of housing services
C) planning of economic and production activities, environmental safety, rational 
development of engineering infrastructures
D) planning of economic and production activities, rational development of engineering 
structures, concentration of economic activities in one place
E) economic planning, use of indigenous labor resources, insufficient energy supply