18. When lawmakers consider legislation concerning environmental disasters, how might they be able to use their knowledge of "risk?"

Why are current extinctions of concern to enviromentalists?

What term describes a doctor who becomes a specialist by meeting standards beyond those of getting a license and passing a test in the specialty area?

When it is summer at the south pole, a. the northern hemisphere is tilted toward the sun. b. the southern hemisphere is tilted away from the sun. c. the northern hemisphere is tilted away from the sun. d. both the southern and northern hemispheres are tilted toward the sun.