Lecture 9

Question 1

Conventional oil

Answer 1

east to extract out of the ground

Question 2

Unconventional sources of oil

Answer 2

Require more energy to extract than they provide

environmentally costly

Question 3

Hubbert’s Peak

Answer 3

Oil/petroleum extraction has a beginning, a peak, and an end.
King Hubbert predicted that petroleum production would peak in the U.S. in late 60s

Question 4

co-generation plants

Answer 4

burns rice hulls to produce steam and electricity

Question 5

Pasture fed cattle need no more land per unit of edible energy than…

Answer 5

broilers or pigs

Question 6

What plant uses the most water?

Answer 6

Sugar cane

Question 7

What animal is the biggest water user?

Answer 7

Beef (cattle)

Question 8

What takes less time to produce things, but has significantly more total input?

Answer 8

Tractors

Question 9

Why is input > output?

Answer 9

Production uses a lot of energy –> building upkeep, transport, feeding, care, slaughter, processing)

Question 10

Why is burning plant matter limited in usefulness?

Answer 10

There isn’t enough plants to burn to replace use of fossil fuels

Question 11

Crop residues are essential for…

Answer 11

soil structure, water retention, erosion control, soil carbon sequestration, etc.

Question 12

In 2012, what was used to produce ethanol?

Answer 12

Corn; used more to produce ethanol than to feed livestock