The United Nations projects that by 2030 the urban population will make up over ________ of the total Earth's population.
A. 20 percent
B. 60 percent
C. 40 percent
D. None of these are correct
Answer: B
Environmental & Atmospheric Sciences
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In Belgium, language boundary sharply divides the country into two regions: Southern Belgians speak French and northern Belgians speak Flemish
Indicate whether the statement is true or false.
Environmental & Atmospheric Sciences
The average Earth density is ________ the mantle density
A) unrelated to B) equal to C) less than D) greater than
Environmental & Atmospheric Sciences
Fossil evidence suggests that such land-dwelling arthropods as _____ had evolved by at least the Devonian
A)trilobites B)molluscs C)scorpions D)beetles E)spiders
Environmental & Atmospheric Sciences
Another word for cover crops is
A. Mulch B. Shade planting C. Green manure D. Strip farming E. All of these are correct
Environmental & Atmospheric Sciences