... Though the major components of the atmosphere vary little today, they have changed dramatically over Earth's history, about 4.6 billion years. The early atmosphere was hardly the life-sustaining blanket of air that it is today; most geologists believe that the main constituents then were nitrogen gas and carbon dioxide, but no free oxygen. In fact, there is no evidence for free ... contains a thin layer of ozone molecules (with three oxygen atoms) which forms a protective layer shielding life on Earth from the Sun's harmful ultraviolet radiation. Ninety-nine percent of "air" is located i...

• Word Count: 3528
• Approx Pages: 14
• Grade Level: High School

... of ozone and water vapor are negligible. Hence the temperature is lower than that of the troposphere or stratosphere. With increasing distance from Earth's surface the chemical composition of air becomes strongly dependent on altitude and the atmosphere becomes enriched with lighter gases. At very high altitudes, the residual gases begin to stratify according to molecular mass, because of ... reduction is caused by particles produced by chemical conversion of acidic gases and certain hydrocarbons. Acid rain Pure rain-water is slightly acidic, primarily because of dissolved carbon dioxi...

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... regulations typically focuses on substantially decreasing levels of carbon monoxide, a colorless, odorless, poisonous gas formed by the incomplete burning of hydrocarbon-based fuels. This incomplete combustion occurs at low air-to-fuel ratios in engines such as during vehicle starting, when cars fail to be properly maintained, during cold weather and at a high altitude. Typically, carbon monoxide is release ... by 35% and 60% respectively. (EPA CAAA) This policy, of technology based rapprochement to emissions control has been criticized as a cost-ineffective strategy for achieving the Nat...

• Word Count: 3394
• Approx Pages: 14
• Has Bibliography
• Grade Level: Undergraduate

... impacts on water distribution, temperature, and microorganism proliferation. Climate-induced changes in pollens and spores and temperature increases that enhance the formation and persistence of certain air pollutants could result in increases in respiratory illnesses. Though still uncertain, the regional effects of climate change on agricultural, animal, and fisheries productivity could increase the ... to mitigate adverse impacts. Adaptive options to minimize health impacts include improved and extended medical care services; enhanced disaster preparedness and relief, increased use of ...

• Word Count: 3240
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• Grade Level: Undergraduate

... dioxide produced when we exhale and burn fossil fuels. Trees also reduce noise pollution, act as wind buffers and absorb dust and other air pollutants. Trees are the essential link in the food chain of life; they capture sunlight and convert it into energy. While it is ... original multi-taskers. Trees provide social, ecological, and economic benefits. Their beauty inspires writers and artists, while their leaves and roots clean the air we breathe and the water we drink. Trees provide useful products Trees are so integrated into our daily lives that it is easy to forget ... dappled shad...

• Word Count: 2774
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• Grade Level: High School

... and reduce visibility to zero. Ash is slippery, especially when wet; roads, highways, and airport runways may become impassable. Automobile and jet engines may stall from ash-clogged air filters and moving parts can be damaged from abrasion, including bearings, brakes, and transmissions (World Almanac and Book Of Facts). Another effect on the environment caused by volcanic eruption ... , including hydrogen sulfide (H2S), hydrogen (H2), carbon monoxide (CO), hydrogen chloride (HCL), hydrogen fluoride (HF), and helium (He). All this gases together with the tephra and entrained air can rise...

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... 's unbearable for people on this planet. "The temperature during an eight-day heat wave in Chicago in July 1995 hovered around 100 degrees Fahrenheit. High levels of humidity made the air feel even hotter, creating an almost unbearable and, ultimately, fatal environment. 556 number of deaths was attributed to the heat, which struck the elderly" ("Issues and Controversies: Global Warming "). ... to produce energy for everything also produces about eighty-percent of carbon dioxide in the atmosphere. Agriculture also contributes to carbon dioxide emissions. Vegetation also emits carbon dio...

• Word Count: 3357
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• Grade Level: High School

... of polar ice caps. Storms The storms on Mars are not hurricanes or thunderstorms. Dust storms occur on Mars. Since there is only a small amount of water vapor in the air, dust is the driving force behind storm activity as it heats the atmosphere by absorbing sunlight. Like Earth hot ... air that rises at the planet's equator is replaced with cooler air. Trade winds result from the cooler air to circulate the dust. Dust storms cause a temperature change on the opposite side of the planet. This can cause the temperature to drop about 50*F and ... "). Dust devils move across the land and p...

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• Has Bibliography
• Grade Level: High School

... There are too many implications and interrelationships to discuss in this paper, but the three substances that our earth consists of: land, water and air, are being destroyed. Our forests are being cut down at an alarming rate, bearing enormous impacts on the health of earth. Our oceans and ... shortage. On the local level, there is erosion of soils (and the loss of vegetation), the depletion of water supply, and toxification of the air and water. The earth is dynamic though, all of these aspects are interrelated, and no one impact is completely isolated. All of these destructive element...

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• Has Bibliography
• Grade Level: High School

... and phosphorus, are provided to enhance growth during the day (Grobbelaar 2004). Mixing the algal materials continuously prevents them from settling. Carbon dioxide is usually satisfied by the natural air, but aerators can be used to increase CO2 absorption. The water pH level and physical environment should ensure about 90% of CO2 absorption for this procedure (Brennan 2010). The ... less maintenance efforts, which can reduce the required energy to produce microalgae and generate their potential. On the other hand, the open pond system experiences certain disadvantages. The open-air des...

• Word Count: 3194
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• Has Bibliography
• Grade Level: Graduate

... problem in time to prevent our own extinction. The environmental movement is in its infancy, and the implementation of such programs as the Clean Air Act of 1970 by the US Environmental Protection Agency are the first steps on the road to recovery. Further revision of the Clean ... Air Act in 1990 and ratification of an international treaty by the United Nations Framework Convention on Climate Change (UNFCCC) at the Rio Summit in ... . The shortfall of 1.2-billion tons could not even be covered by the US buying greenhouse gas emission credits from other countries", he said the so calle...

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... , which explains why desert regions can be Nicholas 8 blistering hot in the daytime and freezing cold at night. Water, however, holds its temperature longer, and provides a sort of natural heating/air-conditioning system for the land areas of the Earth. Temperature extremes would be much more erratic than they are, were it not for the fact that approximately four-fifths of ... , but often fail to realize that approximately 90% of our oxygen comes from microscopic plants in the seas. If our oceans were appreciably smaller, we soon would be out of air to breathe. Can a person reasonably be ...

• Word Count: 2632
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• Grade Level: High School

... of population expansion in the tropics and the use of land for agriculture and wood for energy. Satellite photos show smoke from the smoldering fires that are rising into the air over the forest. The desire of developed countries for inexpensive meat and forest products is another major contributor to deforestation. The sale of the expensive tropical wood is another. Each ... oil production, and leakage from natural gas pipelines. Atmospheric methane concentration is now increasing at about 1% per year. CFC-12 is primarily used as the working fluid in refrigerators and air conditioners....

• Word Count: 2775
• Approx Pages: 11
• Grade Level: Undergraduate

... day and night will be a huge difference. People will more likely be able to die of heat stress, if the earth starts getting warmer than it already is. Also, the air pollutions in the world will get into our lungs as we breathe. This could carry diseases, and it will make us very sick. Thus, not only must we save the ... the world and if people would just take the extra five or ten minutes it takes to walk somewhere close instead of drive, the world would be a healthier place. Other air pollutions such as chlorofluorocarbons (CFC's) found in most hair sprays and aerosol cans do not have ...

• Word Count: 2564
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• Grade Level: High School

... the United States, 500 more than a normal year. Many scientists have agreed that the increase in extreme weather events is due to increases in atmospheric temperature, resulting in warmer, moist air that acts as a powerful driving force in extreme weather events like severe storms and heavy rains. The spread of some infectious insect-borne diseases is another effect of climate change ... ...

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... "may so alter the living world that it will be unable to sustain life in the manner that we know."" The problems facing the environment today are vast and diverse. Air pollution and the emission of greenhouse gases are just some of the problems that will reach critical proportions in the coming decades. Since the following Rio Declaration in 1992, which ... ...

• Word Count: 2601
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• Has Bibliography
• Grade Level: Undergraduate

... are ones that experience intense drought or extreme cold. Desert animals cope with heat and water shortage by remaining below ground by day. In tundra and on polar ice, winter air temperatures can fall to below -40 C (-40 F). The few animals that do remain active on land or ice during winter, such as seals and male emperor penguins, rely on a thick ... ...

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... disease is also prominent during warming. The pulmonary aspects of global warming appear as increased levels of aero-allergens. Altered concentrations of aero allergens, i.e. spores and moulds, as well as air-pollutants, such as ozone, are produced by the photochemical reactions that are sensitive to temperature [Emberlin, 1994]. The heat generated by global warming has been shown to increase levels of ... ...

• Word Count: 3241
• Approx Pages: 13
• Grade Level: Undergraduate