The average price tag for ecosystem services has been placed at around $.........$ per year.

  • A
    $18$ billion $US$ dollars
  • B
    $18$ trillion $US$ dollars
  • C
    $33$ billion $US$ dollars
  • D
    $33$ trillion $US$ dollars

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Similar Questions

An ecosystem can be described as:

Phytoplankton $\rightarrow$ Submerged plant stage $\rightarrow$ Floating plant stage $\rightarrow$ Reed-swamp stage $\rightarrow$ Marsh-meadow stage $\rightarrow$ Scrub $\rightarrow$ Forest. What type of succession does this sequence represent?

Define/Explain: Keystone species.

Which of the following statements is incorrect?

What does primary succession indicate in the development of a community?

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