Question
(a) Fig. 5.1 shows a power station. Power stations release waste gases into the atmosphere when they burn fossil fuels.
Name two gases that cause pollution when released into the atmosphere. State one effect of each of these gases on the environment.
gas ……………………………………………………………………………………………………………………
effect ………………………………………………………………………………………………………………….
gas ……………………………………………………………………………………………………………………
effect ………………………………………………………………………………………………………………….
(b) In some countries wood is an important fuel. Wood may be collected by cutting down trees in forests. State three undesirable effects of deforestation.
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Answer/Explanation
Ans:
(a) carbon dioxide;
global warming/ greenhouse effect;
sulfur dioxide;
acid rain/ acidification/trees and plants die/aquatic organisms die/ leaches minerals from soil;
nitrogen oxides;
global warming/ acid rain/ trees and plants die/ aquatic organisms die/ leaches minerals from soil;
methane;
global warming;
ozone;
decrease in level of photosynthesis / decrease in flower and fruit production;
AVP;;
(b) extinction of species / loss of biodiversity / loss of habitat;
disruption of food chains;
increase in carbon dioxide resulting in global warming;
loss of soil/ soil erosion;
flooding;
loss of potential medicines / useful chemicals;
changes to water cycle/weather patterns / desertification;
AVP;