Review for Quarterly

TEST REVIEW

I. The Tragedy of the Commons

A. Define the Tragedy of the Commons and describe examples of this concept:

- The Tragedy of the Commons refers to a situation where shared resources are depleted or degraded because individuals act in their self-interest, disregarding the common good.

- Examples include overfishing in open-access fisheries, overgrazing of communal pastures, and air pollution in areas with unregulated emissions.

### II. Sustainability

A. Define sustainability and describe examples of sustainable practices:

- Sustainability involves meeting present needs without compromising the ability of future generations to meet their own needs.

- Examples of sustainable practices include renewable energy use, recycling, afforestation, organic farming, and sustainable water management.

### III. The Green Revolution and the impacts of modern intensive agriculture

A. Describe the Green Revolution and the changes in agricultural practices that followed it:

- The Green Revolution was a period of increased agricultural productivity due to the adoption of high-yielding crop varieties, modern farming techniques, and chemical inputs.

- Changes included the use of fertilizers, pesticides, and improved irrigation methods.

B. List the advantages and disadvantages of using genetically modified crops in agriculture:

- Advantages: Increased crop yield, resistance to pests and diseases, reduced need for chemical inputs.

- Disadvantages: Environmental concerns, potential harm to non-target organisms, ethical considerations.

C. List the environmental impacts of farming on land and water resources:

- Land: Soil erosion, deforestation, loss of biodiversity.

- Water: Water pollution from pesticides and fertilizers, depletion of aquifers, altered water flow in rivers.

D. Describe the different tilling methods and their impacts on the soil:

- Tilling methods include conventional tillage, conservation tillage, and no-till.

- Impacts vary but generally include soil erosion, compaction, and disruption of soil structure.

### IV. Irrigation

A. Describe the different methods of irrigation, their benefits, and their drawbacks:

- Methods: Drip irrigation, flood irrigation, sprinkler irrigation.

- Benefits: Increased crop yields, water efficiency.

- Drawbacks: Water wastage, salinization of soil.

B. Which food items need the most water to produce and which food items need the least?

- Most water-intensive: Beef, almonds, rice.

- Least water-intensive: Fruits, vegetables, legumes.

C. Where is the Ogallala Aquifer and how is it currently being impacted by modern intensive agriculture?

- The Ogallala Aquifer is in the central U.S.

- It's being depleted faster than it's being recharged due to excessive water use in agriculture.

### V. Pest Control Methods and Pesticide Resistance

A. Discuss the relationship between pesticide use and the development of pesticide resistance:

- Pesticide use can lead to the selection of resistant pests, reducing the effectiveness of the pesticide over time.

### VI. Meat Production Methods

A. List the benefits and drawbacks of Concentrated Animal Feeding Operations (CAFOs):

- Benefits: Increased efficiency, higher production.

- Drawbacks: Environmental pollution, animal welfare concerns.

B. Describe a risk of the use of antibiotics in CAFOs:

- Antibiotic resistance can develop, affecting human health.

C. Compare the meat consumption of people in developing countries and in industrialized countries:

- Generally, industrialized countries have higher meat consumption per capita.

D. Compare the greenhouse gas emissions caused by the raising of different animals for food:

- Generally, cattle (especially beef) have higher emissions compared to poultry and pork.

E. List the benefits and drawbacks of Free Range Grazing:

- Benefits: Improved animal welfare, potential environmental benefits.

- Drawbacks: Lower efficiency, land use concerns.