Although Pluto and Charon were both formed in the outer solar system, they are very different. Charon is much more uniform, its surface mainly frozen water and its atmosphere very thin or nonexistent. No spacecraft have visited Pluto. NASA is currently considering a mission called New Horizons that would explore both Pluto and the Kuiper Belt region...
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The earliest it would launch is 2006. It will take and send pictures of Pluto's surface and thin atmosphere. It will also take readings of the planets temperature and weather. Pluto's atmosphere was detected in 1988. We know that its surface pressure is about 100,000 times smaller than that on Earth but still large enough for us to expect weather, winds, haze, chemistry, and an ionosphere...
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1984 Some of these pollutants can be created by indoor activities such as smoking and cooking. In the United States, we spend about 80-90% of our time inside buildings, and so our exposure to harmful indoor pollutants can be serious...	2 / 306
Air Pollution The Environmental Protection Agency is responsible for enforcing the act. Internationally, 49 countries agreed in 1985 on a United Nations convention to protect the ozone layer...	2 / 330
speech on air pollution 97 percent of the acid rain and haze-causing sulfur dioxide, 85 percent of the ozone smog-causing nitrogen oxide, and 99 percent of the toxic mercury pollution come from the utility sector...	3 / 597
Anthropogenic Effects It can produce nitric acid, ozone pollution, and photochemical smog. Another pollutant from the automobile is photochemical smog. This pollutant results from the interaction of sunlight and combustion products in automobile exhaust...	2 / 534