The ____________________ principle in evaluating environmental policies states that we should make decisions that help to prevent a problem from occurring or becoming worse.
Fill in the blank(s) with the appropriate word(s).
prevention
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There are five small glaciers shown on this map (glaciers are shown as white patches with blue contour lines). Why can glaciers survive today in these locations but not in others?
The question is based on Map T-13, the “Mono Craters, California” quadrangle (scale 1:62,500; contour interval 80 feet), and Figures 48-5 and 48-7, a detailed map and stereogram, and Map T-23a, a satellite image, of the same region. The heavily glaciated eastern crest of the Sierra Nevada is seen along the western sides of the map and stereograms (37°52'37"N, 119°12'40"W). During the Pleistocene, glaciers in this region flowed down the valleys of the eastern slope of the Sierra toward the Mono Lake basin to the northeast. Large lateral moraines are found at the mouths of each canyon. What will be an ideal response?
Which is not a factor that leads geologists to expect that convection in the mantle is likely?
A) Viscosity in the lithosphere is high. B) Viscosity beneath the lithosphere is lower because the rock is close to its melting temperature. C) Some of the lithosphere is denser than the asthenosphere. D) The thickness and mass of the mantle are huge.
The Northern Hemisphere of Earth is closest to the Sun in ____
a. January b. April c. June d. August e. October
A difference in air density can cause
A) refraction. B) reflection. C) scattering. D) absorption.