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env 101 > lecture 12: agriculture developments > Flashcards

lecture 12: agriculture developments Flashcards

1
Q

Cuyahoga River

Fire

A

The Cuyahoga river caught on fire
multiple times due to oil and sludge
being dumped by industries.

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2
Q

Third Wave of Environmental Policy

A

Environmental activism led to
new environmental protection
laws in the 1960s –70s.

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3
Q

Two types of land devoted to agriculture

A

Cropland –used for raising plants

Rangeland –used for grazing livestock

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4
Q

How much of US is devoted to agriculture?

A

About 50%
• Cropland –20%
• Pasture and Rangeland –29%

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5
Q

Nevada Land Cover

A

74% of Nevada is rangeland (shrubs)

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6
Q

Polycultures

A

mixed crops

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7
Q

History of Agriculture

A

Traditional, Industrial Agriculture

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8
Q

Industrial Agriculture four key developments

A 
(#1) Mechanized Farm equipment
(#2) Groundwater pumping 
and Spray Irrigation
(#3) Synthetic Fertilizers 
(#4) New Wheat Variety
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9
Q

Currently, __ of world population

supported by synthetic fertilizers

A

27%

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env 101 (4 decks)

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