神马作文网什么是global warming
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什么是global warming
我需要global warming的英文定义.
我需要global warming的英文定义.
What is Global Warming?
Global warming refers solely to the fact that the Earth's atmosphere is
warming near its surface.Simply put,it's getting hotter.The term does
not imply a cause or speak to cause.The scientific community believes
climate changes like global warming have occurred throughout Earth's
history and will continue to occur in the future.Some evidence links
global warming to solar activity; however,there are other theories as
well.
One popular theory relates to the "greenhouse effect." Gases that make up
our atmosphere are analogous to a greenhouse in that they allow sunlight
to pass through,then trap much of the heat from escaping.This naturally
occurring phenomenon keeps Earth's surface warmer than it would be
otherwise.However,human produced compounds regularly released into the
atmosphere in recent years have "thickened the greenhouse wall" beyond
naturally occurring levels.When this happens,even less heat escapes,
causing temperature to rise.This is called greenhouse warming and
results in global warming.
While the scientific community accepts global warming as a given,
greenhouse warming is more controversial.Everyone agrees that
human-produced compounds like carbon dioxide,methane,
chlorofluorocarbons (CFC's),etc.are being released into the atmosphere,
yet some argue it's not clear how this factors into the changes in global
warming.
Another distinct issue commonly associated with greenhouse warming and
global warming is the ozone.Ozone is a naturally occurring gas in the
lower atmosphere that helps trap heat.The burning of fossil fuels
creates even more ozone,as ozone is one component of smog.As ozone
builds,so does trapped heat,increasing the greenhouse effect.
Additionally,ozone plays a role in the upper atmosphere where it shields
the Earth from deadly ultraviolet (UV) radiation.Unfortunately,CFC's -
the same human produced compound that acts like a greenhouse gas in the
lower atmosphere - destroy ozone.This can result in holes in our upper
ozone layer as seen over Antarctica where cold temperatures,atmospheric
circulation and other factors combine to 'draw' these ozone holes.
In conclusion,global warming and the issues surrounding it have
far-reaching implications and can significantly impact human life on many
levels.For this reason,scientists want to know how long the Earth has
been warming,at what rate is it warming,and what factors are causing
it.These answers will better prepare us to handle the effects of global
warming.
Global warming refers solely to the fact that the Earth's atmosphere is
warming near its surface.Simply put,it's getting hotter.The term does
not imply a cause or speak to cause.The scientific community believes
climate changes like global warming have occurred throughout Earth's
history and will continue to occur in the future.Some evidence links
global warming to solar activity; however,there are other theories as
well.
One popular theory relates to the "greenhouse effect." Gases that make up
our atmosphere are analogous to a greenhouse in that they allow sunlight
to pass through,then trap much of the heat from escaping.This naturally
occurring phenomenon keeps Earth's surface warmer than it would be
otherwise.However,human produced compounds regularly released into the
atmosphere in recent years have "thickened the greenhouse wall" beyond
naturally occurring levels.When this happens,even less heat escapes,
causing temperature to rise.This is called greenhouse warming and
results in global warming.
While the scientific community accepts global warming as a given,
greenhouse warming is more controversial.Everyone agrees that
human-produced compounds like carbon dioxide,methane,
chlorofluorocarbons (CFC's),etc.are being released into the atmosphere,
yet some argue it's not clear how this factors into the changes in global
warming.
Another distinct issue commonly associated with greenhouse warming and
global warming is the ozone.Ozone is a naturally occurring gas in the
lower atmosphere that helps trap heat.The burning of fossil fuels
creates even more ozone,as ozone is one component of smog.As ozone
builds,so does trapped heat,increasing the greenhouse effect.
Additionally,ozone plays a role in the upper atmosphere where it shields
the Earth from deadly ultraviolet (UV) radiation.Unfortunately,CFC's -
the same human produced compound that acts like a greenhouse gas in the
lower atmosphere - destroy ozone.This can result in holes in our upper
ozone layer as seen over Antarctica where cold temperatures,atmospheric
circulation and other factors combine to 'draw' these ozone holes.
In conclusion,global warming and the issues surrounding it have
far-reaching implications and can significantly impact human life on many
levels.For this reason,scientists want to know how long the Earth has
been warming,at what rate is it warming,and what factors are causing
it.These answers will better prepare us to handle the effects of global
warming.