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
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings
• 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
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings
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/
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings
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)
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings
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
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings
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
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings
Environmental ramifications of eating meat Land and water are needed to raise food for livestock
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings
Aquaculture
• raising aquatic organisms for food in a controlled environment- open-water pens or
land-based ponds
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings
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
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings
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