Robert Constanza and his colleagues have shown that ________
A) the value of ecosystem services is more than $48 trillion in 2013 dollars
B) ecosystems services cannot be assigned monetary values because they are external
C) ecosystem services are valued at less than 0.5% of the U.S. GDP
D) nutrient cycling is the least valuable of ecosystem services
E) NAFTA has had environmental benefits worth $2.7 billion in 2011
A
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What is the transitional organism from invertebrates to vertebrates?
a. Ophiuroids b. Echinoids c. Salps d. Amphioxus
Then, in 2010, Metro Portland made a historic agreement between landowners and citizens which ________
A) prohibited agriculture on any undeveloped land in the region B) gave each individual landowner an equal portion of the region's land C) included a regional plan to identify exactly where urban growth would be allowed D) converted all undeveloped land to restored natural ecosystems E) put up undeveloped land at auction to be sold to the highest bidders, public or private
Microscopic plants and animals that live in ocean water are termed ____________________
Fill in the blank(s) with correct word
The amount of water vapor in the air compared to the greatest amount of water the air could hold at a given temperature is known as the ____
a. saturated humidity b. specific humidity c. absolute humidity d. relative humidity e. potential humidity