Saltwater in the ocean covers
a. 97% of the earth's surface
b. 98% of the earth's surface
c. 50% of the earth's surface
d. 71% of the earth's surface
e. 97% of the biosphere
D
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The current (2017) human population is about
A. 7.5 billion. B. 10 billion. C. 4 billion. D. 4.6 billion.
All of the following are landscaping features of green buildings EXCEPT ________
A) the use of plants that are native to the area where the building is being constructed B) planting deciduous trees to allow light to pass in the winter and shade buildings in the summer C) rain gardens that absorb runoff D) rooftops planted with vegetation E) landscaping with AstroTurf in dry environments
The soil type alfisols is found in what areas of Sub-Saharan Africa?
A) tropical rainforest B) Sahara desert C) grasslands and semidesert areas D) the Sahel E) grasslands, semidesert areas and the Sahel
Which region has the largest number of the 10 most populous countries within its boundaries?