When the EPA began risk assessment in the mid-1970s, it was primarily concerned with
A) the safety of public transportation systems.
B) interactions between people and wildlife in national parks.
C) cancer risks associated with pesticides and toxic chemicals.
D) accidents associated with lost time on the job and workers' compensation.
C
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Ali Farka Touré, known as the Bluesman of Africa, hailed from which nation in Africa?
A) Senegal B) Mali C) Ghana D) Burkina Faso E) Nigeria
To rocket from Earth to the Moon requires a speed
A. at any sustained speed if time isn't a factor. B. at least that of escape speed from Earth. C. more than escape speed from Earth. D. none of the above
In the twentieth century, half of the new dams that were built are in
A. Russia B. China C. The United States D. Pakistan E. Canada
The gradient of streams tends to be ____________________ in their upper reaches and ____________________ in their lower reaches
Fill in the blank(s) with correct word