Week #5

Question 1

what systems provide us with food?

Answer 1

Croplands (77%)
Rangelands (16%)
Ocean fisheries (7%)

Question 2

what are we eating?

Answer 2

30, 000 edible plant species
Primary plants
Wheat, rice, corn: (>50% calories)
Primary animals/protein
Fish, beef, pork and chicken

Question 3

what is the great irony of food?

Answer 3

> 1 billion people do not have enough food to maintain good health

> 1 billion people confront health issues assoc. with an excess of food

Question 4

what is canada’s role in food production?

Answer 4

-$95B industry
Farms get much larger to “corporate farms”
Most agriculture in prarie provinces, growing grains their, Quebec and ontario are significant contributors

Question 5

What are 4 ways to increase food supply?

Answer 5

Green Revolution techniques
Increase crop production
Produce more meat
Produce more fish/shellfish

Question 6

what are green revolution techniques to increase food supply?

Answer 6

3 steps
Monocultures; genetically engineered high-yield varieties (selection)
Large inputs of water, fertilizers and pesticides
Multiple cropping

Question 7

what are other green revolution techniques?

Answer 7

cross breeding, and Genetically Modified organisms

Question 8

what is advantages and disadvantages of GMO

Answer 8

need less fertalizer/ water, faster growth, higher yield

- lower nutrition, toxins

Question 9

how are gmo’s created?

Answer 9

1. Locate gene you want (target gene)
2. Insert it into bacterial plasmid DNA
3. Plasmid put into bacteria to multiply
4. Target gene put into target organism

Question 10

what are some aspects of producing meat?

Answer 10

Rangelands -Grasslands in temperate and tropical regions
Environmental consequences of feedlots
Overgrazing, waste, grain, methane, soil issues, water use

Question 11

what are aspects of producing fish?

Answer 11

Overfishing, commercial extinction and subsidies
75% fisheries overfished
- Above max. sustainable yield
Fisheries – high concentration of aquatic species suitable for commercial harvesting
Aquaculture – 
aquatic feedlots
Fish farming
Fish ranching

Question 12

Producing More Fish and Shellfish:Problems/Solutions

Answer 12

Problems: waste concentration, food requirement, eutrophication, habitat destruction, species entanglement, GMO 
     escape
Solutions:
Sustainable 
    aquaculture 
    practices
Aquaponics?