Introduction to Environmental Science

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Previous Lessons
Open Chapter Ch. 1: Science and the Environment
Lesson #1 The State of the Planet
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Lesson #2 Environmental Science and the Environmental Movement
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Lesson #3 3 Unifying Themes - Sustainability, Sound Science and Stewardship
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Lesson #4 Moving Towards a Sustainable Future
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Open Chapter Ch. 2: Economics, Politics, and Public Policy
Lesson #5 Economics and the Environment
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Lesson #6 Resources in a Sustainable Economy
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Lesson #7 Environmental Public Policy
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Lesson #8 Benefit-Cost Analysis of Environmental Public Policy
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Lesson #9 Politics and the Environment
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Open Chapter Ch. 3: Basic Needs of Living Things
Lesson #10 Organisms in Their Environment
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Lesson #11 Environmental Factors
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Lesson #12 Matter in Living and Nonliving Systems
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Lesson #13 Matter and Energy
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Lesson #14 The Cycling of Matter in Ecosystems
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Open Chapter Ch. 4: Populations and Communities
Lesson #15 Dynamics of Natural Populations
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Lesson #16 Limits on Population
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Lesson #17 Community Interactions
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Lesson #18 Evolution as a Force for Change
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Lesson #19 Implications for Human Management
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Open Chapter Ch. 5: Ecosystems: Energy, Patterns, and Disturbance
Lesson #20 Characteristics of Ecosystems
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Lesson #21 The Flow of Energy in Ecosystems
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Lesson #22 From Ecosystems to Global Biomes
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Lesson #23 Ecosystem Responses to Disturbance
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Lesson #24 Human Values and Ecosystem Sustainability
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Open Chapter Ch. 6: Wild Species and Biodiversity
Lesson #25 The Value of Wild Species and Biodiversity
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Lesson #26 Biodiversity and Its Decline
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Lesson #27 Saving Wild Species
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Lesson #28 Protecting Biodiversity Internationally
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Exam Exam 1
Open Chapter Ch. 7: The Value, Use, and Restoration of Ecosystems
Lesson #29 Ecosystem Capital
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Lesson #30 Consumption and Production
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Lesson #31 Biomes and Ecosystems Under Pressure
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Lesson #32 Protection and Restoration
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Open Chapter Ch. 8: The Human Population
Lesson #33 The Human Population
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Lesson #34 Population and Consumption: Different Worlds
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Lesson #35 Consequences of Population Growth and Affluence
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Lesson #36 Projecting Future Populations
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Open Chapter Ch. 9: Population and Development
Lesson #37 Predicting the Demographic Transition
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Lesson #38 Promoting Development
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Lesson #39 A New Direction: Social Modernization
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Open Chapter Ch. 10: Water: Hydrologic Cycle and Human Use
Lesson #40 Water: A Vital Resource
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Lesson #41 Hydrologic Cycle: Natural Cycle, Human Impacts
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Lesson #42 Water: Getting Enough, Controlling Excess
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Lesson #43 Water Stewardship: Supply and Public Policy
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Open Chapter Ch. 11: Soil: The Foundation for Land Ecosystems
Lesson #44 Soil and Plants
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Lesson #45 Soil Degradation
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Lesson #46 Soil Conservation
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Open Chapter Ch. 12: The Production and Distribution of Food
Lesson #47 Crops and Animals: Major Patterns of Food Production
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Lesson #48 From Green Revolution to Gene Revolution
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Lesson #49 Food Distribution and Trade
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Lesson #50 Hunger, Malnutrition, and Famine
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Lesson #51 The Future: Feeding the World as We Approach 2030-2050
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Exam Midterm Exam
Open Chapter Ch. 13: Pests and Pest Control
Lesson #52 The Need for Pest Control
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Lesson #53 Chemical Treatment: Promises and Problems
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Lesson #54 Alternative Pest Control Methods
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Lesson #55 Making a Coherent Plan
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Lesson #56 Pests, Pesticides, and Policy
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Open Chapter Ch. 14: Energy from Fossil Fuels
Lesson #57 Energy from Fossil Fuels
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Lesson #58 Exploiting Crude Oil
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Lesson #59 Drilling for Natural Gas
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Lesson #60 Mining Coal
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Lesson #61 Energy Policy
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Open Chapter Ch. 15: Nuclear Power
Lesson #62 Nuclear Energy in Perspective
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Lesson #63 How Nuclear Power Works
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Lesson #64 The Hazards and Costs of Nuclear Power Facilities
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Lesson #65 More Advanced Reactors
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Lesson #66 The Future of Nuclear Power
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Open Chapter Ch. 16: Renewable Energy
Lesson #67 Strategic Issues
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Lesson #68 Putting Solar Energy to Work
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Lesson #69 Indirect Solar Energy
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Lesson #70 Renewable Energy for Transportation
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Lesson #71 Additional Renewable Energy Options
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Lesson #72 Policies for Renewable Energy
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Open Chapter Ch. 17: Environmental Hazards and Human Health
Lesson #73 Links Between Human Health and the Environment
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Lesson #74 Pathways of Risk
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Lesson #75 Risk Assessment
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Open Chapter Ch. 18: Global Climate Change
Lesson #76 Atmosphere, Weather, and Climate
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Lesson #77 Climate Change Science
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Lesson #78 Response to Climate Change
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Exam Exam 3
Open Chapter Ch. 19: Atmospheric Pollution
Lesson #79 Air Pollution Essentials
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Lesson #80 Major Air Pollutants and Their Sources
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Lesson #81 Impacts of Air Pollutants
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Lesson #82 Bringing Air Pollution Under Control
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Lesson #83 Destruction of the Ozone Layer
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Open Chapter Ch. 20: Water Pollution and Its Prevention
Lesson #84 Perspectives on Water Pollution
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Lesson #85 Wastewater Treatment and Management
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Lesson #86 Eutrophication
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Lesson #87 Public Policy and Water Pollution
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Open Chapter Ch. 21: Municipal Solid Waste: Disposal and Recovery
Lesson #88 Solid Waste: Landfills and Combustion
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Lesson #89 Better Solutions: Source Reduction and Recycling
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Lesson #90 Public Policy and Waste Management
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Open Chapter Ch. 22: Hazardous Chemicals: Pollution and Prevention
Lesson #91 Toxicology and Chemical Hazards
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Lesson #92 Hazardous Waste Disposal
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Lesson #93 Cleaning Up the Mess
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Lesson #94 Managing Current Toxic Chemicals and Waste
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Lesson #95 Hazardous Chemicals: Pollution and Prevention
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Open Chapter Ch. 23: Sustainable Communities and Lifestyles
Lesson #96 Urban Sprawl
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Lesson #97 Urban Blight
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Lesson #98 Moving Towards Sustainable Cities and Communities
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Lesson #99 Lifestyles and the Common Good
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Exam Final Exam

Assignments:

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Lesson Objectives:

- The grain supply
- Food security



Human beings have been trading grains for centuries. Grains include wheat, rice, corn, barley, rye and sorghum. Initially, only western Europe imported grain. By the 1950s, this had changed. Asia and Africa now import a significant amount of grain.

Today, the United States is the bread basket of the world and the major source of exportable grains. Most governments maintain a grain reserve of 70 days, some have more. There is enough grain in the world today to feed every human being. However, the problem is not the food supply but the access, as many people cannot afford food.



From 2006-2008, the price of food went up a lot and there were food riots and emergency measures in many countries.

Concern for food security, or access for every individual to nutritious food to sustain an active and healthy life, has gone up.

In a capitalist economy like ours, there is enough food being produced, but being able to eat nutritious food requires having enough money to buy it. The bulk of this responsibility falls upon families.

When families cannot meet needs, they need a safety net - policies or programs that meet the food security needs of everyone in society at the local, state or national level. Today, more than 50,000 local charities feed Americans who are hungry. Feeding America is a network of food banks that provides emergency food help for 25 million Americans.