How does greenhouse gas affect the Earth

How does greenhouse gas affect the Earth
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What are Greenhouse Gases?A greenhouse gas is a chemical compound found in the Earth钬檚 atmosphere.Acting as gases,these compounds allow sunlight to enter the atmosphere freely.As sunlight strikes the Earth,some is re-radiated off the Earth钬檚 surface and back towards space in the form of infrared radiation,or heat.This heat is absorbed by greenhouse gases and trapped in our atmosphere.
There have always been gases that exhibit greenhouse properties.Some of the greenhouse gases occur in nature such as water,vapor,carbon dioxide,methane and nitrous oxide.Others,specifically industrial gases,are man made.To keep the Earth钬檚 temperature constant,the amount of energy Earth receives from the sun should be relatively close to the amount of energy radiated off Earth钬檚 surface back into space.
Why are Greenhouse Herve Leger Crisscross Bandage Gas Levels Increasing?The Industrial Revolution was a turning point for our society in many ways.With industry we saw the growth of our economy paralleled by the increase in the level of greenhouse gas emissions.Several greenhouse gases have increased by approximately 25 percent in the last 150 years.Anthropogenic emissions are those caused by man.In the last two decades,almost 75 percent of these anthropogenic emissions come from the burning of fossil fuels.(need I remind you,fossil fuels are not a renewable energy source!) These anthropogenic emissions have escalated the concentration of carbon dioxide in Earth钬檚 atmosphere.
How Do Greenhouse Gases Affect Climate Change?As concentrations of greenhouse gases rise,the average Herve Leger Asymmetrical Neck surface temperature of the Earth increases over time.The Earth钬檚 rising temperature produces a change in weather patterns and sea levels.This is known as climate change.
Reportedly,the Earth钬檚 climate has increased between 0.6 and 0.9 degrees over the past century.This increase is attributed to human activity.
What are the Sources of Greenhouse Herve Leger Sweetheart Bandage Gases?The primary source of greenhouse gas emissions in the US is the combustion of fossil fuels in energy use.(Again,fossil fuels are not a renewable energy source).The demand for energy is driven by economic growth.Weather patterns affecting heating and cooling use and fuel used in electricity generation creates short term fluctuation on energy demands as well.
Carbon dioxide emissions that are energy related are a result of the combustion of petroleum,coal,and natural gas.Of the total anthropogenic gas emissions produced by the US,82 percent were energy related.
Other Greenhouse gases The following numbers were taken for the Energy Information Administration,Emissions of Greenhouse Gases in the United States 2006 (Washington,D.C.November 2007).Energy related carbon dioxide gas emissions are 82.3 percent of the United States anthropogenic greenhouse gas emissions.Other contributing anthropogenic gases are as follows:
Methane - 8.6 percent.This greenhouse gas comes from landfills,coal mines,oil and natural gas operations and agriculture.Nitrous oxide - 5.4 percent.This is emitted through the use of nitrogen fertilizers,from burning fossil fuels and from certain industrial and waste management processes.Miscellaneous - 2.2 percent.This Controversial Myspace Survey category includes several man made gases,including hydrofluorocarbons (HFC),perfluorocarbons (PFC) and sulfur hexafluoride (SF6) that are released as byproducts of industrial processes and through leakage.
Note:Since the Energy Information Administrations report,it has been reported that nitrogen trifluoride is of rising concern.This man made gas was thought to be a replacement for perfluorocarbons.It was reported in October 2008 that the greenhouse gases it emits had been grossly understated and should be cause for future concern