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Darth Cycy

What are the Causes of Global warming - 0 views

  • It’s a scientifically proven “Fact,” that over the past century, our planet has slowly been warming up. Since the beginning of the 20th century, the average temperature around the world has gradually risen by one degree fharenheit.While this minimal warming might not seem all that significant, the truth is, according to Climatic Specialists all around the globe, the over-all impact will most certainly prove to be devastating if this continual warming process is not somehow ebated. Scientists have been busily searching and studying in order to determine precisely what the primary, “key factors” are behind this progressive “heating up” process. Here’s what they have come up with thus far:
  • The Main Causes of Global Warming (Manmade & Nature) To the surprise of many out-spoken environmentalists, it, in fact, turns out mankind and technology actually aren’t the only significant causes of global warming. There actually are a wide variety of 100%, ‘all natural” causes, ranging from volcanic eruptions, solar radiation and natural thawing of the Earths “permafrost” and glaciers. In other words, the planet’s temperature, just like most other things in life and natural science, simply tends to fluctuate through natural, rhythmic, “ebbs and flows” and highs and lows that are caused and by sources within the planet itself, as well as the vacillating environment of  the solar system and universe that we are passively passing through. However, before we start to get too comfortable and confidently assume that we as human beings are officially “off the hook,” the fact remains that several “man made” causes play a significant role in our current, global warming trend. Welcome to the Greenhouse. Yes, the “Greenhouse” effect may very well be the most popular new term utilized in environmental circles and it’s time people really begin to understand exactly what it is, what it does and what we can do about it.
  • What Are Greenhouse Gases Greenhouse gases, being lighter than air, naturally rise up the outer limits of the earth’s atmosphere and then settle there, creating an impenetrable barrier that traps heat from being able to escape into space, holding it hostage within our environment and warming the temperature in the process. It is feared that unless we change our ways, getting smarter about our greenhouse gas emissions, they could increase an addition 5 to 9% over the next hundred years and lead to some very serious problems maintaining a comfortable and healthy life on Earth. So where does this greenhouse gas come from and what other culprits are responsible for our “global warming” problems?
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  • Carbon Dioxide from Power Plants: Nearly 40% of our carbon dioxide emissions come directly from the process of burning ‘fossil fuels” in order to generate electricity. Of that almost 40% of our CO2 emissions directly attributed to generating power, over 90% of it comes from the burning of coal. Coal emits 25% more carbon per “unit of energy” than oil and 70% more carbon than natural gas. Carbon Dioxide from Automobiles: Approximately 1/3 of the carbon dioxide emissions released into our environment comes from the burning of gasoline in internal-combustion engines of automobiles, buses, motorcycles, “SUVs,” recreational vehicles, trucks and of course, motor sports. As motor sports (racing) continue to grow in popularity, the huge amount of fuel being used continues to grow annually. Just NASCAR alone, which is only one of numerous racing associations, admits that it burns over 1 million gallons of gas per year when you combine the gasoline used for the racing, trials, practice runs, etc. That doesn’t even take into account the gas spent traveling, hauling the cars, equipment, team and tools for each car back and forth to the track
  • Carbon Dioxide from Airplanes: The United Nation's Intergovernmental Panel on Climate Change estimates that aviation currently is responsible for just under 5% of global warming and that the figure could very well rise to approximate 15% by the year 2050. Carbon Dioxide from Buildings: Scientists claim that something so very mundane as the regular maintenance, temperature control and cleaning of buildings structure actually account for nearly 12% of carbon dioxide emissions. Methane: CO2 is not the only “Greenhouse Gas” that the planet is contending with these days. While carbon dioxide may be primary greenhouse gas, methane actually is 20 times more effective as CO2 at trapping heat in the Earths atmosphere. Emissions of methane released into our atmosphere have risen 145% in the last 100 years. Methane naturally occurs as part of the biological processes behind everything from bovine flatulence to the organic bacteria and sulfur’s commonly found in bogs, springs, and wells. Methane is a natural form of gas that is released in rice paddies as well as the composting and decomposition of organic matter. However, methane gas is also released during the processing and preparation of fossil fuels. Water Vapor: Believe it or not, something as natural and simple as “water vapor,” is the most prevalent and effective greenhouse gas on the planet. But, much of the cause behind its increasing levels entering the atmosphere is due to already increased global warming that has taken place, due to increased levels of CO2, methane as well as other greenhouse gases.
  • Water vapor is responsible for 2/3 of the heat currently trapped in the Earth’s atmosphere by all greenhouse gases. The hotter the atmosphere gets, the higher the level of “relative humidity” which holds the heat in even better. Nitrous Oxide: Yet another of the infamous “Greenhouse Gasses, Nitrous oxide (N2O) is a colorless, non-flammable gas with a slightly sweet odor. Most commonly known as “laughing gas” and used as a medical anesthetic, nitrous oxide is naturally produced by oceans and rainforests. Nitrous oxide is naturally broken down in the atmosphere through chemical reactions that occur with sunlight. Some of the most prevalent “man-made” sources of nitrous oxide are agricultural fertilizers, nylon, catalytic converters and nitric acid, along with the burning of organic matter. Deforestation: According to NASA, besides, human caused carbon dioxide emissions released into the environment, deforestation actually now is the 2nd most prolific cause of atmospheric CO2 influx. Deforestation is responsible for nearly ¼ of all carbon emissions entering the atmosphere. The planet cuts and burns nearly 34 million acres of trees each year, including millions of acres of “rainforest,” equal to the size of the entire country of Italy. The process of deforestation is “doubly” dangerous for the planet, because not only are we adding millions of tons of carbon dioxide into the atmosphere each year, but we are also wiping out the most effective cleansers of that deadly CO2 gas, the trees and plants that naturally “thrive” by consuming the carbon dioxide and offering up pure, clean, breathable oxygen as a free byproduct of the plant life cycle.
  • Melting Permafrost: Permafrost is the frozen soil throughout the arctic and sub-arctic regions, that contain all kinds of organic matter such as all kinds of frozen plants and animals that have been frozen solid and held inert for 30,000 years. Approximately 25% of the land mass of the Northern Hemisphere is “permafrost,’ or soil with a temperature of 32 degrees Fahrenheit (0 degrees Celsius) or less. Permafrost has acted like a jail cell for carbon, methane and other greenhouse gases for several thousand years, perhaps dating back to the last “Ice Age.” As glacial regions and permafrost begin to melt, the 50 billion tons of carbon that scientists estimate is held in a state on inactive, suspended animation under the frozen surface of the tundra will begin and continue to be released into our atmosphere, creating a greenhouse effect that would make the residents of the hottest and most humid tropical islands faint in mere minute. OK … so now we know the causes of Global Warming. It’s not ALL our fault, but we certainly have played a significant role in the decline of our environmental integrity. However, when you stop to think about it, that’s actually good news! You see, if we played a major role in creating, the problem, that logically means that we can also play a major role in SOLVING the problem! So just like in a good game of chess … it’s your move!
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    Global warming FACTS!
Fermina Arguello

Global Warming- Science - The New York Times - 0 views

  • Global warming has become perhaps the most complicated issue facing world leaders. Warnings from the scientific community are becoming louder, as an increasing body of science points to rising dangers from the ongoing buildup of human-related greenhouse gases — produced mainly by the burning of fossil fuels and forests.
  • In mid-February 2012, Secretary of State Hillary Rodham Clinton was expected to announce a new international effort focused on reducing emissions of common pollutants that contribute to rapid climate change and widespread health problems.
  • The United Nations conference on climate change in Cancún, Mexico, produced only modest achievements but ended with the toughest issues unresolved. The package that was approved, known as the Cancún Agreements, set up a new fund to help poor countries adapt to climate changes, created new mechanisms for transfer of clean energy technology, provided compensation for the preservation of tropical forests and strengthened the emissions reductions pledges that came out of the U.N. climate change meeting in Copenhagen in 2009.
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  • At the 2011 conference delegates from about 200 nations gathered together in Durban, South Africa. One of the issues left unresolved was the future of the Kyoto Protocol, the 1997 agreement that requires major industrialized nations to meet targets on emissions reduction but imposes no mandates on developing countries, including emerging economic powers and sources of global greenhouse gas emissions like China, India, Brazil and South Africa.
  • In December 2011, the European Union’s highest court endorsed the bloc’s plan to begin charging the world’s biggest airlines for their greenhouse gas emissions from Jan. 1, 2012, setting the stage for a potentially costly trade war with the United States, China and other countries.
  • Airlines for America, an industry lobby group and one of the plaintiffs in the case, said that its members would be required to pay more than $3.1 billion to the E.U. between 2012 and 2020. It said its members would comply with the system “under protest,” but would also review options for pursuing the case in Britain’s High Court, which had referred the original complaint to the European court in 2009.
  • The United States has been criticized at the United Nations gatherings for years, in part because of its rejection of the Kyoto framework and in part because it has not adopted a comprehensive domestic program for reducing its own greenhouse gas emissions. President Obama has pledged to reduce American emissions 17 percent below 2005 levels by 2020, but his preferred approach, a nationwide cap-and-trade system for carbon pollution, was passed by the House in 2009 but died in the Senate the next year. United States emissions are down about 6 percent over the past five years, largely because of the drop in industrial and electricity production caused by the recession.
  • In March 2012, the E.P.A. unveiled a draft rule that would limit carbon dioxide emissions from new power plants to 1,000 pounds per megawatt-hour.
  • To open an avenue to companies still planning to build coal plants, for example, the E.P.A. said it would allow new ones to begin operating with higher levels of emissions as long as the average annual emissions over a period of 30 years met the standard.
  • Scientists learned long ago that the earth’s climate has powerfully shaped the history of the human species — biologically, culturally and geographically. But only in the last few decades has research revealed that humans can be a powerful influence on the climate, as well.  
  • That conclusion has emerged through a broad body of analysis in fields as disparate as glaciology, the study of glacial formations, and palynology, the study of the distribution of pollen grains in lake mud. It is based on a host of assessments by the world’s leading organizations of climate and earth scientists.
    • sabrina jubis
       
      Human gas emissions conferences to decrease climate change and global warming
  • human-related greenhouse gases — produced mainly by the burning of fossil fuels and forests.
  • human-related greenhouse gases — produced mainly by the burning of fossil fuels and forests.
  • 194 countries to cooperatively discuss global climate change and its impact.
  • Emissions rose 5.9 percent in 2010, according to the Global Carbon Project,
  • Global warming has become perhaps the most complicated issue facing world leaders. Warnings from the scientific community are becoming louder, as an increasing body of science points to rising dangers from the ongoing buildup of human-related greenhouse gases — produced mainly by the burning of fossil fuels and forests.
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    Here is information of Global Warming and Climate change. Also here are some descusions and decision made about climate change and global warming.
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    Global Warming is one of the most importants because the ice in the poles are starting to melt and this can led to very big tsunamis and floods can start to happen
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    The average surface temperature of earth has increased more than 1 degree Fahrenheit since 1900 and the rate of warming has been nearly three times the century-long average since 1970. Almost all experts studying the recent climate history of the earth agree now that human activities, mainly the release of heat-trapping gases from smokestacks, tailpipes, and burning forests, are probably the dominant force driving the trend.
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    global waming 
Javier Aviles

Greenhouse Gas Emissions | Climate Change | U.S. EPA - 0 views

  • Carbon dioxide enters the atmosphere through the burning of fossil fuels (oil, natural gas, and coal), solid waste, trees and wood products, and also as a result of other chemical reactions
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    This is what causes global warming and all of the other gasses
Samantha Aragon

Global Warming Interactive, Global Warming Simulation, Climate Change Simulation - Nati... - 0 views

    • javier miguel
       
      This is a deffinition of the green house effect.
  • The rapid rise in greenhouse gases is a problem because it is changing the climate faster than some living things may be able to adapt. Also, a new and more unpredictable climate poses unique challenges to all life.
  • What Is Global Warming?
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    The "greenhouse effect" is the warming that happens when certain gases in Earth's atmosphere trap heat. These gases let in light but keep heat from escaping, like the glass walls of a greenhouse. First, sunlight shines onto the Earth's surface, where it is absorbed and then radiates back into the atmosphere as heat. In the atmosphere, "greenhouse" gases trap some of this heat, and the rest escapes into space. The more greenhouse gases are in the atmosphere, the more heat gets trapped. Scientists have known about the greenhouse effect since 1824, when Joseph Fourier calculated that the Earth would be much colder if it had no atmosphere. This greenhouse effect is what keeps the Earth's climate livable. Without it, the Earth's surface would be an average of about 60 degrees Fahrenheit cooler. In 1895, the Swedish chemist Svante Arrhenius discovered that humans could enhance the greenhouse effect by making carbon dioxide, a greenhouse gas. He kicked off 100 years of climate research that has given us a sophisticated understanding of global warming.
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    science of global warming
Darth Cycy

Global dimming - Wikipedia, the free encyclopedia - 0 views

  • Global dimming is the gradual reduction in the amount of global direct irradiance at the Earth's surface that was observed for several decades after the start of systematic measurements in the 1950s. The effect varies by location, but worldwide it has been estimated to be of the order of a 4% reduction over the three decades from 1960–1990. However, after discounting an anomaly caused by the eruption of Mount Pinatubo in 1991, a very slight reversal in the overall trend has been observed.[1] Global dimming is thought to have been caused by an increase in particulates such as sulfate aerosols in the atmosphere due to human action. It has interfered with the hydrological cycle by reducing evaporation and may have reduced rainfall in some areas. Global dimming also creates a cooling effect that may have partially masked the effect of greenhouse gases on global warming. Deliberate manipulation of this dimming effect is being considered as a geoengineering technique to reduce the impact of global warming.[citation needed]
  • It is thought that global dimming is probably due to the increased presence of aerosol particles in the atmosphere caused by human action.[2] Aerosols and other particulates absorb solar energy and reflect sunlight back into space. The pollutants can also become nuclei for cloud droplets. Water droplets in clouds coalesce around the particles.[3] Increased pollution causes more particulates and thereby creates clouds consisting of a greater number of smaller droplets (that is, the same amount of water is spread over more droplets). The smaller droplets make clouds more reflective, so that more incoming sunlight is reflected back into space and less reaches the Earth's surface. In models, these smaller droplets also decrease rainfall.[4] Clouds intercept both heat from the sun and heat radiated from the Earth. Their effects are complex and vary in time, location, and altitude. Usually during the daytime the interception of sunlight predominates, giving a cooling effect; however, at night the re-radiation of heat to the Earth slows the Earth's heat loss.
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    A description af Global Dimming and its current effect on earth.
Fermina Arguello

Articles: The Global Warming Hoax: How Soon We Forget - 0 views

  • The truth is that CO2 is a beneficial trace gas that exists in such small quantities in our atmosphere, that the idea of it playing any significant role in determining our climate is simply silly. 
  • There are millions of smart people out there who have been bombarded with this global warming nonsense for so long that they've actually come to believe it.
titi cro

CBBC - Newsround - Newsround's guide to the protests in Egypt - 0 views

  • egan on 25 Jan
  • began on 25 January 2011
  • used water cannon and tear gas to try to stop the protesters,
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  • 300 people were killed in the first 10 days
  • protesters cheered, embraced, waved their flags and honked car horns
  • military would run the country for the time being.
  • after 30 years in power.
  • wasn't doing enough to stop poverty and corruption
  • enough jobs
  • a Google marketing executive called Wael Ghonim.
  • Facebook to help start the protests, but was locked up in police custody for 12 days.
  • helped to re-energise the protests.
  • protests were well educated and tech savvy people like Wael Ghonim, who had only known an Egypt under President Mubarak.
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    Newsround's guide to the protests in Egypt
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