... Most of these emissions, about 82%, are from burning fossil fuels to generate electricity and power our cars. The remaining emissions are from methane from wastes in landfills, raising livestock, natural gas pipelines, and coal, as well as from industrial chemicals and other sources. Once, all climate changes occurred naturally. However, during the Industrial Revolution, we began altering our climate ... and factories raises the concentration of carbon dioxide in the atmosphere. The steady accumulation of these greenhouse gases can cause a variety of impacts on global climate. As the cl...

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• Grade Level: Undergraduate

... and mechanisms to produce alternative clean energy and power from traditional petroleum fuels. With simple structure, short cell cycle, the ability to grow in various water environments, and natural photosynthesis process, microalgae can provide viable biomass to produce biofuels. This paper will examine different production techniques to harvest proper quantity and quality of microalgal biomass, as well ... , reduce carbon footprint, and establish success in meeting the rising energy demand with renewable and green technology. Introduction and Background Sustainability is the key featur...

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• Grade Level: Graduate

... burning fossil fuels, greenhouse gases remained in relative balance. This affected climates to produce ice ages and heat waves that were the result of natural variation caused by sudden fluctuations in the sun's emission of radiation, volcanic eruptions and other affects. Also an increase in sea levels has forced ... "). But too much carbon dioxide can cause increase in temperature. "Since the 1800s, societies have burned fossil fuel like oil, coal, and natural gas. Burning these fossil fuels will also give off carbon dioxide. The past 25 years, scientists have measure about an eight- per...

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• Grade Level: High School

... constant. Beginning about 1850, however, the CO2 level began to rise, due in large part to the industrial burning of coal, oil, and natural gas. The atmospheric CO2 level in 1850 was approximately 270 ppm; thus it has already increased by about 30%. Human activities are now causing at ... landfills, and in coal seams. It is also released as a result of forest clearing, venting in association with 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 an...

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• Grade Level: Undergraduate

Global Warming - Its Implications on the Human Population Though there is some scepticism that climate change is a result of human actions, it is unlikely to be a natural event. Some dismiss the phenomenon known as "global warming" as a hoax, and claim that yuppies driving SUVs could not possibly change the overall temperature of the earth. In a sense, this ... , studies show that the surface temperature of the earth has been increasing at a rate of 0.17 degrees Celsius per decade [Haines et al., 1998]. These figures are not consistent with a natural trend, and, when one considers the tens of...

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• Grade Level: Undergraduate

... of tetrapod breakwaters which saved it from destruction during the 2004 Indian ocean tsunami. However, tetrapods are not aesthetically pleasing and pose a danger to swimmers and surfers. One of the natural causes of climate change is variations in solar output. The sun emits varying amounts of solar radiation due to changes in its magnetic field. An increase in magnetic activity results ... end of the last solar cycle was in 2008. Between 2000 and 2008, the amount of solar activity decreased yet the average temperature of the world increased by 1.2o C. Another natural cause is volcanic ...

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... Gore's life, both connected by his involvement in the global warming. On one side, Gore shows technical explanations (about radiations, thin atmosphere layer, CO2 levels, etc.), proof about global warming (natural disasters: hurricanes, typhoons, temperatures rising, changed oceanic currents), while on the other side he presents some personal episodes which more or less influenced his decision to tackle the climate change ... Jeff Orlowski. Here, James Balog, an American   photographer shows that all the glaciers of the world have retreated tremendously or disappeared in the recent y...

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• Grade Level: Undergraduate

... "inimitable contrivances for adjusting the focus to different distances, and for the correct ionospherical and chromatic aberration, could have been formed by natural selection. This seems..... absurd in the highest degree."(Darwin,1927). Genetic and molecular biologists can now measure the degree of similarity between ... not have been found. Dr. Colin Patterson (1981) was the Senior Principal Scientific Office0r in the Paleontology Department at the British Museum of Natural History, and he said that "evolution was a faith," and that he had" been duped into taking evolutionism as revea...

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... pleading his case to members of the European Union argued that Canada should get credits for its "clean energy" exports to the US, such as natural gas. He said in a meeting with EU officials in Spain last May that Canada would not be in a position to ratify if these issues ... teleconference from New Delhi last October, environment minister David Anderson said he didn't expect Canada's proposal for credits to be accepted (3). Canada's argument is that natural gas exports to the US replace the use of dirtier fuels like coal, furthering Kyoto's aim of reducing GHG's in the atmosphere. As s...

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• Grade Level: Undergraduate

... science, more than 1500 scientists, and the director general of the United Nations Educational, Scientific and Cultural Organization (UNESCO). The document's message was clear, stating that "human beings and the natural world are on a collision course,"" which "may so alter the living world that it will be unable to sustain life in the manner that we know."" The problems facing the ... the year 2012 to the levels that they were at in 1990. Greenhouse gases(like carbon dioxide) are most often created as a result of burning fossil fuels such as coal, natural gas, and oil. The acceptance o...

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• Grade Level: Undergraduate

... land mass, 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 ... explained by postulating that the Earth simply received, a "lucky break."" However unlikely the idea of "lucky break" is, we see that there is obviously a designer working to make perfect the natural world around u...

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... is far greater than those in the third world, so their impacts are not much different overall. The reduction of forest land possesses two main environmental dangers. Forests are great natural repositories of carbon. Trees breathe in carbon dioxide and store it, acting as carbon reservoirs. As such, they are invaluable agents in keeping the level of carbon in the atmosphere ... half of global warming, and fossil fuels account for two-thirds of manmade carbon dioxide(Ehrlich and Ehrlich, 1970, p.134). The consumption of energy from fossil fuels. Coal, oil, and natural gas used for industr...

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... . Man has seemingly conquered his only remaining predators - famine and disease. The only thing more alarming than our population growth is the rate at which we are using up our natural resources. Our population numbers have grown following the traditional J-curve of any predator with nearly unlimited resources, but when and how will the crash come? We have fouled our own ... ...

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... pollutants. Trees are the essential link in the food chain of life; they capture sunlight and convert it into energy. While it is impossible to put a price tag on their natural gifts, we know that trees have a measurable effect on the monetary value of a landscape. In fact, a recent study has shown that up to 20% of a property value lies within its ... ...

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• Grade Level: High School

Since Earth's early days, volcanic eruptions have shaped our planet and now we know they have shaped other planets as well. Volcanic eruptions constitute one of the minor natural disasters on the planet Earth because they cause fewer fatalities than earthquakes and famines (Encyclopedia Britannica). Even though, scientists have estimated that at least 200,000 persons have lost their ... ...

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... living multicellular organisms. Fungi are among the longest-lived organisms on Earth. Some are thought to be more than 4,500 years old. Fungi are essential to the functioning of all natural ecosystems. They are among the leading decomposers of organic matter; breaking down plant and animal remains and wastes into their chemical states, as well as having a critical role in the ... ...

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... ). Atmospheric temperature and chemistry are believed to be controlled by the trace gases. There is increasing evidence that the percentages of environmentally significant trace gases are changing because of both natural and human factors. Examples of man-made gases are the chlorofluorocarbons CFC-11 and CFC-12 and halons. Carbon dioxide, nitrous oxide, and methane (CH4) are produced by the burning ... ...

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