Chapter 5: Environmental Economics and Consumption
Chapter
5. Chapter 5: Environmental Economics and Consumption
What are ecosystem services?...
Interactive Study Guide
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Guiding Question 5.1
What are ecosystem services? How can it be useful to place a monetary value on these services even if we know it will not be accurate?
Why You Should Care
It is hard to imagine all of the ways that the environment around us contributes to our lives. It is easy to measure how much food we eat or how much paper we use, but there are dozens of other contributions that are harder to measure (how much energy goes into making a cell phone, how much land is needed to recycle all the carbon dioxide a person produces, etc). These contributions are called ecosystem services.
Even if we could accurately measure those smaller contributions in terms that made sense (acres of forest, farmland, and wetlands, trees to produce oxygen, etc.), we know that it is hard to measure what value to place on each contribution. Should the forest have more value than wetlands (and does this reflect our being more familiar with forests than swamps?) Can we assign a monetary value to these contributions? Who sets that value? Is a forest in Georgia worth the same as a forest in Brazil?
The process of placing a monetary value on an ecosystem service forces us to recognize the direct importance of sustainable practices for keeping natural systems and ourselves alive. The value may not include every possible aspect, but it reminds and informs our decision-making.
Test Your Vocabulary
Select the appropriate term for each of the following definitions:
Term
Definition
Essential ecological processes that make life on Earth possible.
Capable of being continued without degrading the environment.
The social science that deals with how we allocate scarce resources.
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Question Sequence
1.
How much are the ecosystem services for raising food (Genetic resources, Pest control, Pollination, and Soil formation) worth?
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2.
What percentage of the total ecosystem services is raising food (Genetic resources, Pest control, Pollination, and Soil formation) worth?
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3.
How much are water resources (Climate Regulation, Waste Treatment, and Water Supply and Regulation) worth to humans?
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4.
What percentage of the overall services is water?
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5.
Obviously, many of these services are being severely impacted by human activities. If these services decrease by 10% per decade, then their service must be taken up by human activities to replace them. Do you think that the cost of replacement would be more or less than the natural service’s estimated worth? Why or why not?
The cost of replacing lost ecosystem services with human-based services would be higher because the technology and infrastructure has not been assembled yet. Also, ecosystem services occur all around us and so there are no transportation costs for them. Human-based services benefit from economies of scale (one large factory is more efficient than several smaller ones) and the scale of replacing services here would include transportation costs.
6.
Humans are estimated to be using about 40% of the ecosystem services of the world to support our activities. By the end of the 21st century that could be as high as 60% of the services. If that happened, would the value of ecosystem services be higher or lower?
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7.
Is it fair to say that making sustainable choices save us money in the short-term? How about in the long-term?
It may or may not save money in the short-term (6 months to 3 years) but sustainable choices do save money in the long term (3-20 years). Supporting and sustaining ecosystem services saves us money if the ecosystem is self-sustaining, while human-based services would need periodic maintenance and attention. Those costs only increase with time, while natural systems provide them for free.
8.
What do sustainable choices do to the overall value of ecosystem services?
Sustainable choices increase the value of ecosystem services because they keep the ecosystems that are providing them intact.