Browse the glossary using this index
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pathogen | disease-causing
agent (1) |
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pathway (of pollution) | the way
a pollutant moves from the source, enters the environment and reaches the
recipient (7) |
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peri-urban | areas
around a city or town in transition between the urban and rural areas and having some characteristics of both (5) |
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permeability | the ease
with which water moves through soil or rock.(1) |
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permeable | water or
other liquids can pass through (4) |
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persistent organic pollutants (POPs) | group of
toxic and persistent synthetic organic pollutants including many pesticides
such as DDT, aldrin (7) |
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persistent pollutant | pollutants
that remain intact when released into the environment because they do not
break down by natural processes (7) |
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pH | measure
of acidity and alkailinity on a scale from 0 to 14. pH 7 is neutral, below 7
is acidic and above 7 is alkaline (8) |
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point source (of pollution) | identifiable
points or places where the source of pollution can be easily located (7) |
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policy | statements
of overall purpose that set out goals and provide principles that should be
followed to achieve those goals (15) |
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polluter pays principle | whoever
is responsible for pollution should pay for the damage caused (8) |
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pollution | introduction
into the environment of substances liable to cause harm to humans and other
living organisms (1) |
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pollution control | measures
taken after wastes have been produced to limit the damage they may cause (8) |
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pollution prevention | avoiding
or minimising the generation of wastes that produce pollutants (8) |
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population composition | characteristics
of a group of people in terms of factors such as their sex, age, marital
status, education, occupation, and relationship to the head of household (2) |
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population pyramid | graph
that displays a population’s age and sex composition (2) |
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ppm | parts
per million; a unit of concentration (7) |
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practices | routine
actions, doing something in the same way every time (13) |
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precautionary principle | be cautious rather than take risks about unknown consequences; do not
to throw any waste to the environment even if you are not certain that damage
will result (8) |
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precipitation | collective
term for rain and snow (4) |
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proclamation | declared
by the parliament, the level of law in Ethiopia below the Constitution (15) |
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programme | any set
of related events, activities or projects (15) |
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protocol | supplement
to a convention or treaty that adds details of rights or obligations (14) |
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pull factors | factors
that attract people to urban areas (5) |
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push factors | factors
that drive people away from the countryside (5) |
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