Unit 5

Question 1

Tragedy of the commons

Answer 1

Optimizing for oneself will cause bad consequences for all (depleting resources like tp COVID)

Question 2

What are the two ways cattle are fed

Answer 2

Feedlots (unhealthy, cheaper bc of less land) and free range(healthier, more expensive bc of more land)

Question 3

What is the main cause of deforestation

Answer 3

Agriculture

Question 4

What is clear cutting

Answer 4

Harvesting every tree in one area

Question 5

Disadvantages of clear cutting

Answer 5

Less photosynthesis, less biodiversity, habitat fragmentation, easier erosion

Question 6

Advantages of clear cutting

Answer 6

Easily replant, less CO2, one road because there’s only one area

Question 7

mining

Answer 7

obtaining materials

Question 8

Refining

Answer 8

removing impurites

Question 9

spoil vs overburden

Answer 9

overburdenn is when the stuff is on top of the ore and spoils is when the stuff is moved or cleared

Question 10

what are tailings

Answer 10

residue of ore

Question 11

what is the most expensive mining practice

Answer 11

subsurface

Question 12

Consequences of subsurface mining

Answer 12

bare earth, desertification, fossil fuels, water toxiticity from runoff

Question 13

What is the main role of forests and what do they provide?

Answer 13

An ecosystem service: Food, medicine, fuel, purification, and biodiversity

Question 14

methods of sustainable forestry

Answer 14

selective cutting
reforestation
reusing wood
IPM pest removal
Prescribed Fries

Question 15

advantages of sustainable forestry

Answer 15

biodiversity, ecosystem safety, IPM helps soils and water purification, and burns allow new growth

Question 16

Green revolution

Answer 16

mechanized farming to maximize profits

Question 17

Disadvantages of the Green revoltuion

Answer 17

Eurtrophication from fertilizer, salinization, a big impact on the natural world

Question 18

What does synthetic fertilizer do

Answer 18

runoff, does not improve soil and causes algae blooms

Question 19

What is water logging

Answer 19

no air pockets, high clay content, (let dry or add sand)

Question 20

salinization

Answer 20

heat+water = salt buildup, fix with large amount of water

Question 21

what is the problem with using just one pesticide?

Answer 21

they create resistant plants that survive the pesticide

Question 22

What is the best method for removing pests?

Answer 22

bunch of methods combined to get rid of pests while reducing the amount used

Question 23

ways to preserve soil

Answer 23

contour plowing
windbreaks
strip cropping
terracing
no till
perennial plants
crop rotation

Question 24

what is aquaculture

Answer 24

artificially harvesting fish for the market, protecting from fishermen, but there are disadvantages

Question 25

Disadvantages of urbanization

Answer 25

Impacts on the water cycle(urban flooding)
Air pollution
Urban sprawls

Question 26

How to remediate urbanization

Answer 26

Adding vegetation
More mass transit for urban sprawl
Permeable roads
Urban planning
Remediate brownfields

Question 27

What is an ecological footprint

Answer 27

How much land required to sustain you

Question 28

5 variables of ecological footprints

Answer 28

Carbon to energy
Built land to houses
Forests to paper
Crop land to food
Fisheries to seafood