CK12 Earth Science

tunathatpeopleeat. Theselimitsareespeciallyimportantforchildrenandpregnantwomen, since mercury particularly affects young people ...

change in pH represents a large change in acidity: rain with a pH of 4.6 is 10 times more acidic than normal rain (with a pH of ...

drinking water suffer population declines. Crops are damaged by acid rain. This is most noticeable in poor nations where people ...

but includes others such as halons, methyl bromide, carbon tetrachloride, and methyl chlo- roform. CFCs were once widely used be ...

Figure 22.11: The September 2006 ozone hole, the largest ever observed. Blue and purple colors show particularly low levels of o ...

Lesson Summary Air pollutants damage human health and the environment. Particulates reduce visi- bility, alter the weather, and ...

polar stratospheric clouds (PSC) Clouds that form in the stratosphere when it is es- pecially cold; PSCs are necessary for the b ...

You can conserve electricity (and thus fossil fuels) at home by turning off light bulbs and appliances when they are not in use, ...

similarly broken apart into the greenhouse gases H 2 O and CO 2. Catalytic converters only work when they are hot, so a lot of e ...

since they can run for a longer time on electricity. Automakers expect that plug-in hybrids will become available around 2010. F ...

Scrubbers remove particles and waste gases from exhaust (Figure22.14). Wet scrubbers use a liquid solution to scrub pollutants. ...

Reducing Ozone Destruction Onesuccessstoryinreducingpollutantsthatharmtheatmosphereconcernsozone-destroying chemicals. In 1973, ...

Kyoto are needed to avoid dangerous climate change. Plans are now being made to replace the Kyoto Protocol with a more effective ...

Figure 22.15: A bus that runs on soybean oil shows the potential of biofuels. ( 1 ) to make sound choices on energy policy. Less ...

How does a cyclone reduce particulate pollution? How can coal power be made so that it has nearly zero carbon contribution to t ...

(2) Andrew Dunn.http://en.wikipedia.org/wiki/Image:LondonSmog.jpg. CC-BY-SA 2.0. (3) http://en.wikipedia.org/wiki/File:Acid_rain ...

Chapter 23 Observing and Exploring Space 23.1 Telescopes Lesson Objectives Explainhowastronomersusethewholeelectromagneticspect ...

The Speed of Light Light travels faster than anything else in the universe. In the almost completely empty vacuum of space, ligh ...

Figure 23.1: This recent picture of the Andromeda Galaxy actually shows the galaxy as it was about 2.5 million years ago. ( 35 ) ...

The Electromagnetic Spectrum Visible light—the light that human eyes can see—comes in a variety of colors. The color of visible ...