帮忙做个英语课件1.What causes the Global Warming?2.What damage does it bring to us (our earth)?3.What can we do about it?就是3个问题,分三张幻灯片的,或者只告诉我内容也行,英文字数不用太多,但也不要太难了,

帮忙做个英语课件1.What causes the Global Warming?2.What damage does it bring to us (our earth)?3.What can we do about it?就是3个问题,分三张幻灯片的,或者只告诉我内容也行,英文字数不用太多,但也不要太难了,
帮忙做个英语课件
1.What causes the Global Warming?
2.What damage does it bring to us (our earth)?
3.What can we do about it?
就是3个问题,分三张幻灯片的,或者只告诉我内容也行,英文字数不用太多,但也不要太难了,

帮忙做个英语课件1.What causes the Global Warming?2.What damage does it bring to us (our earth)?3.What can we do about it?就是3个问题,分三张幻灯片的,或者只告诉我内容也行,英文字数不用太多,但也不要太难了,
危害The side effects of global warming are alarminS.A warmer global climate melts the ice caps,raising sea levels.What is more,it disturbs weather patterns,causing droughts,severe storms,hurricanes (飓风).People suffer a lot from disasters relevant to global warming.
措施To stop global warming we should make immediate and continual efforts.We hope the situation will soon change.Global warming catches and holds our concern,for it affects us and will affect our later generations.We cannot wait any longer.Do it.Do it right.Do it right now.
But solutions are in sight.We know where most heat-trapping gases come from:power plants and vehicles.And we know how to curb their emissions:modern technologies and stronger laws.By shifting the perception of global warming from abstract threat to pressing reality,and promoting online activism.By pressing businesses to use less energy and build more efficient products.And by fighting for laws that will speed these advances.
原因 According to the National Academy of Sciences,the Earth's surface temperature has risen by about 1 degree Fahrenheit in the past century,with accelerated warming during the past two decades.There is new and stronger evidence that most of the warming over the last 50 years is attributable to human activities.
Human activities have altered the chemical composition of the atmosphere through the buildup of greenhouse gases – primarily carbon dioxide,methane,and nitrous oxide.The heat-trapping property of these gases is undisputed although uncertainties exist about exactly how earth’s climate responds to them.
Energy from the sun drives the earth's weather and climate,and heats the earth's surface; in turn,the earth radiates energy back into space.Atmospheric greenhouse gases,such as water vapor,carbon dioxide,trap some of the outgoing energy,retaining heat somewhat like the glass panels of a greenhouse.
Without this natural "greenhouse effect," temperatures would be much lower than they are now,and life as known today would not be possible.Instead,thanks to greenhouse gases,the earth's average temperature is a more hospitable 60°F.
However,problems may arise when the atmospheric concentration of greenhouse gases increases.Once,all climate changes occurred naturally.However,during the Industrial Revolution,we began altering our climate and environment through changing agricultural and industrial practices.