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Environmental Science (Envi 201) Question Paper

Environmental Science (Envi 201)

Course:Environmental Science

Institution: Kenya Methodist University question papers

Exam Year:2012

TIME : 2 HOURS

Instructions: Answer ALL questions in SECTION A and any TWO from SECTION B.
SECTION A: 30 MARKS
Answer ALL the Questions.

Question One
State any THREE chemical compounds that are primarily responsible for the thinning of the stratospheric ozone layer stating one major origin of each.
(3 Marks)

State THREE actions that local governments in urban areas could take to reduce outdoor air pollution.
(3 Marks)

Describe any FOUR main environmental problems of the global concern and state one main cause of each.
(4 Marks)

Question Two
With specific examples explain how introduction of exotic invasive species has caused extinction of wildlife species.
(3 Marks)
Describe how the carbon in an elephant’s body tissues is made available to the environment for use by other organisms.
(3 Marks)
Describe FOUR ways in which deforestation affect a watershed.
(4 Marks)

Question Three
Give THREE examples of green-house gases and state two major anthropogenic sources of each.
(3 Marks)
Describe how changes in polar ice would amplify or dampen global warming.
(3 Marks)
State FOUR reasons why human population increase is now a major concern in the world.
(4 Marks)
SECTION B: (40 MARKS)
Answer any TWO Questions.

Question Four
State the worldview associated with agricultural societies and then discuss THREE benefits and TWO consequences experienced as a result of their interaction with the natural environment.
(12 Marks)

Describe FOUR approaches through which we can regulate the commons and state the weaknesses of each.
(8 Marks)

Question Five
Explain FIVE practical ways how the municipal water demands can be reduced.
(10 Marks)

"Biological resources are essential to the human society". Explain the reality of this statement giving specific examples.
(10 Marks)

Question Six
Explain FIVE specific ways by which global warming may be mitigated.
(10 Marks)
Discuss any FIVE factors that have contributed to human population explosion in developing countries.
(10 Marks)

Environmental Science (Envi 201) Question Paper

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