Which of these is the largest component of normal air?
a. Nitrogen
b. Oxygen
c. Carbon dioxide
d. Water vapours
       
Which atmospheric layer contains the ozone responsible for filtering out ultra violet radiation?
a. Troposphere
b. Stratosphere
c. Mesosphere
d. Thermosphere
       
How many people in Europe are affected by summer smog pollution?
a. About 25 million
b. Up to 40 million
c. Around 60 million
d. More than 100 million
       
Why are children more at risk from air pollution than adults?
a. Polluting gases are closer to the ground and so children breathe them in more easily.
b. Children breathe a greater volume of air relative to their body size than adults.
c. Adult lungs are more resistant to air pollution.
d. They are not more at risk; adults are because they are more likely to spend their days in polluted environments.
       
Which of these chemicals is a cause of acidification?
a. Sulphur dioxide
b. Nitrogen oxides
c. Ammonia
d. All of the above
       
Which of these air pollutants has been linked to cancer?
a. Asbestos
b. Radon gas
c. Electro-magnetic radiation
d. All of the above
       
Which of these air pollutants cause headaches and nose and throat irritation?
a. Carbon dioxide
b. Ozone
c. Fine particles and heavy metals
d. None of the above
       
Which of these chemical substances affects tissue oxygenation?
a. Ozone
b. Carbon dioxide
c. Carbon oxide
d. Volatile organic compounds
       
Which of these air pollutants increases the risk of cancer?
a. Sulphur oxides
b. Ozone
c. Nitrogen oxides
d. Dioxins
       
Which of the following tendencies is true?
a. Urban areas are growing worldwide, as are their pollution levels.
b. Road transport contributes more than half of all nitrogen oxide emissions.
c. Some air pollutants can be transported long distances downwind and deposited onto natural surfaces.
d. All of the above
       
"Hot spot" is a term used to describe:
a. An area with high summer temperatures
b. High, short-term pollution concentrations
c. A river suffering from eutrophication
d. None of above
       
Which of the following statements is true?
a. Europe's contribution to most man-made emissions of greenhouse gases is disproportionately large in relation to its geographical area and population size.
b. Indoor quality is often underestimated or ignored.
c. Populations near so-called "hot spots" are at risk of exposure.
d. All of the above.
       


 
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