Download Environmental Science Demystified: A Self-Teaching Guide by Linda Williams PDF

By Linda Williams

This can be the precise self-teaching advisor for an individual drawn to uncomplicated earth composition and improvement of the ever-changing nature of our planet. the writer covers a big selection of issues together with: surroundings, water, worldwide warming, atmospheric differentiation, geomorphology, glaciers, erosion, carbon relationship, acid rain, and masses extra. It contains real-world examples, environmental notes, suggestions, clinical information, and overseas developments.

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Extra info for Environmental Science Demystified: A Self-Teaching Guide

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Three percent of these acres are preserved in public lands and 1 percent is privately owned and managed. It comes as no surprise that when trees are lost through deforestation, biodiversity drops. When forests or grasslands are cleared and planted as a single cash or food crop, the number of species drops to one, plus a few weeds. But this is only part of the problem. Since forests support animal species with food and shelter, these species are also eliminated. Often, new species replace the originals, but generally the number of species goes down.

1-2 Northern and Southern Hemisphere currents are constantly circulating. 16 PART ONE Atmosphere Mantle The mantle is the next layer in the Earth’s crust. It is located just below the lithosphere. The mantle makes up over 80% of the earth’s volume. It is estimated to be about 2,900 km thick. The mantle is not the same all the way through. It is divided into two layers: the upper mantle, or asthenosphere (asthenes is Greek for “weak”), and the lower mantle. These layers are not the same. They contain rock of different density and makeup.

Hotspot animal species are found only within the boundaries of the hotspot, since they are often specifically adapted to endemic plant species as their main food source. 4% of the planet’s land area—were listed. Hotspots target regions where the extinction threat is the greatest to the greatest number of species. This allows biologists to focus cost-effective efforts on critical species. Endemic species have been isolated over a long period of geologic time. Islands, surrounded by water, have the most endemic species.

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