Costanza and his colleagues put the value of nature's services at about 33 trillion US dollars each…
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Costanza and his colleagues put the value of nature's services at about trillion US dollars each year. The global gross national product was about trillion US dollars each year.
- How many times is the value of the services the global product, to two decimals?
- How much larger is it, in trillion US dollars?
- NCERT rounds the ratio. To one decimal, what is it?
Need a reminder? The key ideaShow
Narrow utilitarian reasons are direct uses, such as food and medicines. Broad utilitarian reasons are services, such as pollination and oxygen. The ethical reason says that every species has a value of its own. Costanza estimated nature's services at about 33 trillion US dollars a year, about 1.8 times the global product.
The worked solution
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Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. Services trillion US dollars a year. Product trillion US dollars a year.
Step 1. (a) times.
Step 2. (b) trillion US dollars a year.
Step 3. (c) to one decimal is .
Answer: times; trillion US dollars a year; .
Source. NCERT, Class XII Biology, chapter 13. The figures are an estimate.
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