natural resources, the environment and agriculture
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Natural Resources, the Environment and Agriculture. Chapter 10. Topics of Discussion. Agriculture and the environment Economics of the environment Economics of resources in agriculture Government policies for agriculture, natural resourcs, and the environment. - PowerPoint PPT PresentationTRANSCRIPT
Natural Resources,the Environmentand Agriculture
Chapter 10
Topics of Discussion
Agriculture and the environmentEconomics of the environmentEconomics of resources in agricultureGovernment policies for agriculture,
natural resourcs, and the environment
Page 211Interactions with natural resources and the environment
Environmental and Natural Resources
Natural resources are part of the environmentEnvironment is a natural resourceEnvironmental Economics
Refers to the study of flows, such as pollution, that affect others
Natural Resource EconomicsThe study of natural assets that are valued for their
productive capacity
Pages 211-212
Agriculture and the Environment
Water pollutionAir pollutionGlobal warmingOther environmental impacts
Pages 212-216
Page 213
Water pollutants are known to cause cancer. Agriculture is leading contributor to water pollution in US.
What are PCBs?
• Polychlorinated Biphenyl - a synthetic, organic chemical once widely used in electrical equipment, specialized hydraulic systems, heat transfer systems, and other industrial products. Highly toxic and a potent carcinogen
• PCBs were a common industrial discharge up around the 1980s and they are now a huge problem.
• Some companies paying billions of dollars to deal with these nasties
Page 213
The greenhouse effect is caused by an increase in atmospheric gases that trap solar radiation, gradually warming the earth’s surface.
Page 215
Temperature record over the past 150 years
The latest science
• National Academy of Sciences, “the warming trend in the global mean surface temperature observations during the past 20 years is undoubtedly real and is substantially greater than the average rate of warming in the 20th century.”
• August 17, 2000• “10 Arctic scientists have reviewed nearly 40
years of polar research… Their new survey paints a picture broadly consistent with climate-model forecasts.
• Mark Serreze, the survey's lead author: "Now, I'm definitely leaning very hard toward accepting the notion, although I haven't toppled yet."
Other Environmental Issues
• Odor– Can be a health hazard– Can depress nearby property values
• Endangering plant and animal species– Endangered Species Act (ESA)– Agriculture is one of many forces that can threaten
species by encroaching on or contaminating their habitat• Open spaces and traditional landscape
– Other people move to these areas and pay premium prices for lots surrounded by farms and/or open spaces
Economics of the Environment
• Does the environment has value?
• Demand and supply for environmental improvements
• WTP – willingness to pay to decrease or abate pollution
Page 217
Efficient level of abatement: as long as WTP is greater than MC, society’s net benefit can be increased by increasing abatement.
So will a market actually arise for environmental improvements leading to a socially optimal
outcome?
Unfortunately, the answer is no since the characteristics of efficient property rights usually are not satisfied for
environmental goods.
Property Rights – privileges and limitations that are associated with the
ownership of a resource.
Efficient Property RightsEnforceability: security of individual rights
Without this, no one would buy a good because it can taken away from them without permission.
Transferability: can be transferred from one individual to anotherWithout this, no market can arise because their sale is not
allowed.Exclusivity: all associated benefits and costs are received by only
the owner of the assetExternalities – consequences of the use or ownership of a
resource that befall someone other than the ownerE.g., farmers do not pay the cost that might be imposed on
downstream anglers due to declining water quality.
Page 218Efficiency and damage from externalities
Figure Explanation• Assume producing at Qm also causes pollution• Neither producers nor consumers of good take these into
account – external to the market• Social MC = MCs = MCm+E• additional cost at Qm= Qm x E = 2+3+5• Net social benefits = (2+3+4) – (2+3+5) = 4-5
• So net social benefits could be increased by supplying less of Q
• So with presence of externality - the free market will not achieve the socially efficient level of production
Cost Effective Environmental Policies• When negative externality exists, the free market will not lead to a
socially efficient outcome.
• The issue of free-riding (e.g., fishermen could be organized and pay E to convince farmers to reduce their production; farmers required to pay the fishermen for the right to pollute)
• As a result, government is frequently involved when externality problems arise.
• Due to difficulty of getting WTP and MC estimates, environmental govt standards are rarely set at socially efficient levels.
Cost Effective PoliciesCommand-and-Control policies
Regulations on technology or restrictions on practicesDoes not take into account heterogeneity of polluters
Taxes and subsidiesTax on pollution or subsidy for abatement
Transferable rightsRights to pollute can be bought and sold by polluters, moving the
permits to pollute to those firms for which abatement is most expensiveGovernment can control overall level of pollution and leave the
allocation up to the market
SummaryEconomists play a role in designing
policies that affect the environment and natural resources.
Incentives matter when designing policies to achieve desired objectives.
Agriculture impacts the environment through water pollution, air pollution, global warming among other ways.
Government plays an active role in guiding and regulating the use of resources and impact on environment.
Chapter 11 discusses other forms of governmental intervention, including price and income supports…