Eating animal products has significant impacts

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings

PowerPoint® Slides prepared by Jay Withgott and Heidi Marcum

Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings

Ch 10Agriculture, Biotechnology, and the Future of Food

Part 2: Environmental Issues and the Search for Solutions


• What kinds of meat do you consume? Beef, chicken, turkey, pork, duck, other fowl, buffalo, deer, other game, fish, shellfish

• How often do you eat meat?- 1x a week or less - 1x a day

- more than 1x a day - never• What kinds of other animal products do you

consume? Milk and dairy, eggs, honey, gelatin (in Jello, some candy), glycerin (in toothpaste)…

• How often do you eat other animal products?- 1x a week or less - 1x a day

- more than 1x a day - never


Eating animal products has significant impacts

• As wealth and commerce increase, so does consumption of meat, milk, and eggs- Global meat production has increased

fivefold- Per capita meat consumption has doubled- http://www.themeatrix.com/

http://www.themeatrix.com/


Concentrated Animal Feeding Operations (CAFOs)- Huge warehouses or pens

designed to deliver energy-rich food to animals living at extremely high densities

- Over ½ of the world’s pork and poultry come from feedlots

Feedlots (factory farms)


The benefits and drawbacks of feedlots

• Benefits- Efficient- more food, less land used

• Drawbacks- Pollution- water and air- Disease in runoff from manure- Heavy uses of antibiotics to control

disease- Animal treatment concerns


Energy choices through food choices

• 90% of energy is lost in each step of food chain

• Some animals convert grain into meat more efficiently than others

• Eating lower on food chain = less energy lost


Environmental ramifications of eating meat Land and water are needed to raise food for livestock



Aquaculture

• raising aquatic organisms for food in a controlled environment- open-water pens or

land-based ponds


Aquaculture is growing rapidly• The fastest-growing type of food production

- Provides a third of the world’s fish for human consumption

- Most widespread in Asia


The benefits and drawbacks of aquaculture

• Benefits:- A reliable protein

source- Sustainable - Protects wild fish- Energy efficient

• Drawbacks:- Diseases, antibiotics- Reduces food security- Waste- Disease introduced to

wild populations

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Eating animal products has significant impacts