Sustainability Answers

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Energy sustainability can best be achieved by using ______.

A
nonrenewable energy sources
B
renewable energy sources
C
carbon sequestration
D
recycled plastics
3

Why are carbon dioxide concentrations expected to increase?

A
Carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase.
B
Carbon dioxide concentrations are expected to increase, because of an increase in agriculture.
C
Carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use.
D
All of the above
4

Which of the following is not a way in which carbon sequestration can benefit soil?

A
decreased erosion
B
increased water quality
C
increased water storage
D
increased soil quality
6

Which of the following is the most likely cause for future water shortages?

A
global warming
B
increased agriculture
C
water pollution
D
erosion
7

How is the world population projected to change in the next few decades?

A
It is projected to level off.
B
It is projected to decrease steadily.
C
It is projected to increase steadily.
D
It is projected to double within 5 years.
9

What is the current greatest threat to agricultural sustainability?

A
erosion
B
water pollution
C
air quality
D
all of the above
11

How do conservation tillage practices in agriculture benefit the soil?

A
They increase soil erosion rates.
B
They decrease water absorption.
C
They decrease water storage.
D
They increase soil nutrient levels.
13

Aquifer

A
Aquifers 1 and 3 may result in a reduced river flow.
A
Aquifer 2 may result in reduced surface water levels.
A
Aquifers 2 and 3 may result in decreased wetland and spring discharge.
A
Aquifer 3 may result in an increase in productivity.

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