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Kate L

Petroleum Pipeline on Flickr - Photo Sharing! - 0 views

flickr.com/12827836

pipeline petroleum

shared by Kate L on 10 Dec 08 - Cached
  • Kate L on 10 Dec 08
     
    The longhorn petroleum pipeline cuts a swath across south Austin.
Stephania D

Exxon Valdez - 0 views

en.wikipedia.org/...Exxon_Valdez

Water Polution case

shared by Stephania D on 03 Dec 08 - Cached
  • It gained widespread infamy after the March 24, 1989 oil spill in which the tanker, captained by Joseph Hazelwood and bound for Long Beach, California, hit Prince William Sound's Bligh Reef and spilled an estimated 10.8 million US gallons (40.9 million liters) of crude oil.
  • This has been recorded as one of the largest spills in U.S. history and one of the largest ecological disasters.
  • At the time of the spill it was employed to transport crude oil from the Alyeska consortium's pipeline terminal in Valdez, Alaska, to the lower 48 states of the United States.
  • ...2 more annotations...
  • The vessel was carrying about 1.26 million barrels, or about 53 million US gallons (200 million liters), of oil at the time it ran aground.
  • On August 27, 2008, Exxon Mobil agreed to pay 75% of the $507.5 million damages ruling to settle the 1989 Exxon Valdez oil spill off Alaska.
  • Stephania D on 03 Dec 08
     
    Exxon Valdez oil spill
Kate L

Grolier Multimedia Encyclopedia - 0 views

gme.grolier.com/...article

energy problems

shared by Kate L on 01 Dec 08 - Cached
  • basic laws of physics dictate that energy is conserved and can only be changed from one form to another or into matter.
  • Fuel, on the other hand, is the accumulation of matter and therefore represents a store of energy.
  • released in the form of heat when the fuel is burned in chemical or nuclear reactions
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  • cannot be reversed to regenerate the original fuel mass
  • a fuel problem does exist
  • If the supply of fuel is finite, not only will there be no energy supply when the fuel is exhausted
    • Kate L
      Kate L on 03 Dec 08
       
      Finite means: a form of a verb that can occur as the head of a sentence. In Sam wants to leave, wants is finite, leave is non-finite.
  • all other processes that depend on it will cease
  • Several factors combine to make the problem an urgent one
  • World population
  • demand for energy will also increase
  • coal, oil (petroleum), natural gas, uranium, and fuel wood—is limited and insufficient to sustain rapid rates of development.
  • debate about the exact length of time available before the effects of a worldwide shortage become apparent
  • shortage will occur.
  • geothermal energy, hydroelectric power, peat, ocean thermal energy, solar energy, tidal energy, wind power, and fuel wood.
  • replenish themselves naturally in a relatively short time and will therefore always be available.
  • Renewable energy resources
  • indirectly responsible for many other renewable energy sources.
  • ocean currents and winds are results of the uneven distribution of solar radiation over the Earth's surface
  • winds in turn produce waves whose energy can be utilized
  • windmills and wind power
  • ocean thermal energy, solar heating of the upper layers of the ocean produces temperature gradients that can be harnessed to generate electricity
  • Sun also powers the hydrologic cycle, in which ocean water is evaporated, transported over the continents, and precipitated as rain or snow to form rivers
  • flow energy produces hydroelectric power.
  • energy locked in such renewable fuel sources as wood and peat is derived from the Sun by the process of photosynthesis.
  • renewable energy source is geothermal energy
  • arises through the leakage of heat from the Earth's interior to the surface
  • over the entire surface of the Earth at a very low average rate, leakage is much higher in certain locations.
  • Yellowstone National Park
  • Iceland, Italy, and New Zealand.
  • possible to tap the heat and use it for human purposes.
  • Nonrenewable resources originate from two processes: (1) photosynthesis, which occurred many millions of years ago, followed by the fossilization of the plant and animal life that resulted, and (2) the formation of the Earth itself.
  • fossil fuels—coal, oil (petroleum), and natural gas;
  • produced the fuels for nuclear energy, such as uranium for fission and lighter elements for fusion
  • irreplaceable fuels represent an energy capital that must be invested wisely.
  • A cleaner-burning fuel than oil, natural gas seemed to be in abundant supply at the turn of the 21st century and, with the greatly enlarged network of gas pipelines, was rapidly growing in use.
  • nearly total dependence on fossil fuels and hydroelectricity ensures that efforts to solve energy problems by switching to alternative sources will have to overcome a great deal of inertia, both economic and psychological.
  • sources as solar power, wind power, and synthetic fuels suffer from the serious drawback that few major installations now exist.
  • handicapped by the engineering problems of converting the energy to a form useful to human beings.
  • solar energy reaches the top of the atmosphere in amounts 10,000 times greater than all human production of energy, it reaches the Earth's surface at rates of only about 80 to 250 W/m2, and considerably less on cloudy days.
  • arge-scale system based on solar-collector panels will be physically huge, causing problems of maintenance and land use
  • Wind power, wave power, and ocean-thermal-generation sources suffer from similar difficulties
    • Kate L
      Kate L on 03 Dec 08
       
      Even though there are some difficulties with working towards the alternative fuels, it may prove to be more efficient for smaller things (heat and power to small communities or single buildings) in the long run
  • Kate L on 01 Dec 08
     
    Energy Problem
Katie M

Global Warming Effects, Global Warming Causes, Causes of Global Warming, Effects of Glo... - 0 views

globalwarming-awareness2007-arshad.com

shared by Katie M on 08 Dec 08 - Cached
  • Many scientists have specified various reasons for global warming effects on the environment and for human life. It is not easy to point one reason for global warming effects, but recently you might have saw many change in global climate. Global warming effects have various consequences such as glacier volume decreasing, rise in sea levels, shrinkage of Arctic and altered fashion of doing agriculture have been named as direct effects on global warming. Secondary global warming effects are extreme weather events, increase in tropical diseases, changes in the timing of seasonal patterns in ecosystems, and drastic economic impact.
  • Before many times back, many scientist and researchers were hopping that a positive effect of global warming would be increased agricultural yields(outputs), because of the role of carbon dioxide in photosynthesis which might behave in positive manner, but now it resulting in destructions of several crops. In the area of Iceland, due the rising temperatures which have made possible the widespread sowing of barley easily in an effective manner, which was not possible twenty years from now. The net result is expected to be that 33% less maize—the country's staple crop—will be grown. The reduction in rainfall has turned millions of land into deserts.
  • Insurance industry has been affected very badly with the risk of insurance; the number of major natural disasters has been increased to 300% since 1960s, and insured losses increased fifteenfold in real terms. According to Choi and Fisher (2003) each 1% increase in annual precipitation could enlarge catastrophe loss by as much as 2.8%.
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  • All major Transportation sources such as Roads, airport runways, railway lines and pipelines, always require time to time maintenance and renewal as they become subject to greater temperature variation. Regions already adversely affected include areas of permafrost, which are subject to high levels of subsidence, resulting in buckling roads, sunken foundations, severely cracked runways and many other related problems.
  • Most of the low-lying countries such as Bangladesh, Indonesia, Netherlands and many other small islands have been affected by sea level rise, in terms of floods or the cost of preventing them. In most of the poorest low-plain countries, land is the only available space, or fertile agricultural land which is livelihood for them. But due to flood they are finding problem now to perform their activities.
  • Katie M on 08 Dec 08
     
    effects of global warming
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