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[科学美国人60秒] 【整理】SSS 2008-02-11

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SSS 2008-02-11

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Not So Fast On Biofuels

Two studies in the latest issue of the journal Science say that producing biofuels may actually produce more carbon dioxide than we would with conventional fuel. Karen Hopkin reports. .



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【整理】SSS 2008-02-11【整理人】ZPC224
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This is Scientific American's 60-Second Science. I am Karen Hopkin, this'll just take a minute.

For years, advocates have touted the use of biofuels as a clean burning alternative to gasoline, now a pair of studies published in the Feb 8 issue of Science conclude that biofuels may do more harm to the environment than good.

The researchers calculated the indirect costs of growing the crops that turned into biofuels. To plant the corn or sugarcane or soybeans from which bio-diesel and bio-ethanol are made, farmers were first need to clear forest and grasslands. That process it turns out would actually generate more carbon dioxide than we save by swearing off fossil fuels and would take centuries for us to pay off that carbon debt. For example, the scientists figured it would take 319 years of using ethanol made from soybeans to make up for the extra carbon released by chopping down the forests needed to grow the crop. And of course more CO2 in the atmosphere means more global warming. So Biofuels might actually exacerbate the problem they are meant to solve. Something to think about as we move forward on producing eco-friendly fuels, as one of the scientists put it, we should make sure that our cure isn't worse than the disease.

Thanks for the minute, for Scientific American's 60-Second Science. I am Karen Hopkin.
点!尔何如?鼓瑟希,铿尔,舍瑟而作,对曰:异乎三子者之撰。子曰:何伤乎?亦各言其志也。曰:莫春者,春服既成,冠者五六人,童子六七人,浴乎沂,风乎舞雩,咏而归。夫子喟然叹曰:吾与点也。
Homework blink.gif
This is Scientifc America's Sixty Seconds Science.
I am Karen Hopkin , this'll just take a minute.

For years advocates have touted the use of Biofuels as a clean burning alternative to gasolines, now a pair of studies published in the Feb 8 issue of science conclude that Biofuels may do more harm to the environment than good.

The researchers has caculated the indirect cost of growing the crops that turned into Biofuels, to plant the corns, sugarcanes and soybeans from which Bio-diesel and Bio-ethnol are made, farmers would first need to clear forest and grass lands, that process turns out would actually generate more carbon dioxide than we would save by swearing off fossils and fuels.

And it would take centuries for us to pay off that Carbon debt.
For example, the scientific figure it would take 319 years of using ethanol made of soybeans to make up for the extra carbon released by chopping down the forest needed to grow the crop.

And of course more CO2 in the atmospehere means more global warming.
So Biofuels may actually exggarate the problem they mean to solve.
Something to think about is we move forward on producing ego friendly fuels, as one of the scientist put it, we should make sure that our cure isn't worse than the disease.

Thanks for the minute, for scientific America's Sxity Seconds Science
I am Karen Hopkin



smile.gif Words
tout: If someone touts something, they try to sell it or convince people that it is good. 吹捧
ethnol: alcohol
you have been somone special to me_______.°`
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on above
This is Scientifc America's Sixty Seconds Science.
I am Carrie Hocken, this'll just take a minute.

For years advocates have touted the use of Biofuels as a clean burning alternative to gasolines, now a pair of studies published in the Feb 8 issue of science conclude that Biofuels may do more harm to the environment than good.

The researchers / caculated the indirect cost of growing the crops that turned into Biofuels, to plant the corns, sugarcanes and soybeans from which Bio-diesel and Bio-? are made, farmers would first need to clear forest and grass lands, that process turns out would actually generate more carbon dioxide than we would save by swearing off fossil fuels.

And it would take centuries for us to pay off that Carbon debt.
For example, the scientist ?? it would take 319 years of using ethanol made soybeans to make up for the extra carbon released by chopping down the forest needed to grow the crop.

And of course more seal to the atmospehere means more global warming.
So Biofuels may actually exacerbate the problem they mean to solve.
Something to think about is we move forward on producing equal friendly fuels, as one of the scientist put it, we should make sure that our cure is worthy than the disease.

Thanks for the minute, for scientific America's Sxity Seconds Science
I am Carrie Hocken
The KALEIDOSCOPE of life
实现无障碍英语沟通
on notrack

This is Scientifc America's Sixty Seconds Science.
I am Carrie Hocken, this'll just take a minute.

For years advocates have touted the use of Biofuels as a clean burning alternative to gasolines, now a pair of studies published in the Feb 8 issue of science conclude that Biofuels may do more harm to the environment than good.

The researchers caculated the indirect cost of growing the crops that turned into Biofuels, to plant the corns, sugarcanes and soybeans from which Bio-diesel and Bio-? are made, farmers would first need to clear forest and grass lands, that process turns out would actually generate more carbon dioxide than we would save by swearing off fossil fuels.

And we take centuries for us to pay off that Carbon debt.
For example, the scientists figure we take 319 years of using ethanol made of soybeans to make up for the extra carbon released by chopping down the forests needed to grow the crop.

And of course more seal to the atmospehere means more global warming.
So Biofuels may actually exacerbate the problem they meant to solve.
Something to think about is we move forward on producing ego friendly fuels, as one of the scientist put it, we should make sure that our cure is worth than the disease.

Thanks for the minute, for scientific America's Sxity Seconds Science
I am Carrie Hocken
Humor first, Joke later...
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on Sophi_a

This is Scientifc America's Sixty Seconds Science.
I am Karren Hopkin, this'll just take a minute.

For years advocates have touted the use of Biofuels as a clean burning alternative to gasoline, now a pair of studies published in the Feb 8 issue of science conclude that Biofuels may do more harm to the environment than good.

The researchers caculated the indirect cost of growing the crops that were turned into Biofuels, to plant the corns, sugarcanes and soybeans from which Bio-diesel and Bio-? are made, farmers would first need to clear forest and grass lands, that process turns out would actually generate more carbon dioxide than we would save by swearing off fossil fuels.

And we take centuries for us to pay off that Carbon debt.
For example, the scientists figure out we take 319 years of using ethanol made from soybeans to make up for the extra carbon released by chopping down the forests needed to grow the crop.

And of course more seal to the atmosphere means more global warming.
So Biofuels may actually exacerbate the problem they meant to solve.
Something to think about is we move forward on producing ego friendly fuels, as one of the scientists put it, we should make sure that our cure is worth than the disease.

Thanks for the minute, for scientific America's Sxity Seconds Science
I am Karren Hopkin.
我爱罗*英俊
on luo

This is Scientifc America's Sixty Seconds Science.
I am Karren Hopkin, this'll just take a minute.

For years advocates have touted the use of Biofuels as a clean burning alternative to gasoline, now a pair of studies published in the Feb 8 issue of Science conclude that Biofuels may do more harm to the environment than good.

The researchers caculated the indirect cost of growing the crops that were turned into Biofuels, to plant the corns, sugarcanes and soybeans from which Bio-diesel and Bio-ethanol are made, farmers would first need to clear forest and grass lands, that process turns out would actually generate more carbon dioxide than we would save by swearing off fossil fuels.

And we take centuries for us to pay off that Carbon debt.
For example, the scientists figure out we take 319 years of using ethanol made from soybeans to make up for the extra carbon released by chopping down the forests needed to grow the crop.

And of course more CO2 to the atmosphere means more global warming.
So Biofuels may actually exacerbate the problem they are meant to solve.
Something to think about is we move forward on producing eco-friendly fuels, as one of the scientists put it, we should make sure that our cure isn't worse than the disease.

Thanks for the minute, for scientific America's Sixty Seconds Science
I am Karren Hopkin.
deardina.spaces.live.com
on Genev smile.gif

This is Scientifc American's Sixty Seconds Science.
I am Karen Hopkin, this'll just take a minute.

For years advocates have touted the use of Biofuels as a clean burning alternative to gasoline, now a pair of studies published in the Feb 8 issue of Science conclude that Biofuels may do more harm to the environment than good.

The researchers caculated the indirect cost of growing the crops that were turned into Biofuels, to plant the corns, sugarcanes and soybeans from which Bio-diesel and Bio-ethanol are made, farmers would first need to clear forest and grass lands, that process turns out would actually generate more carbon dioxide than we would save by swearing off fossil fuels.

And we take centuries for us to pay off that Carbon debt.
For example, the scientists figure out we take 319 years of using ethanol made from soybeans to make up for the extra carbon released by chopping down the forests needed to grow the crop.

And of course more CO2 to the atmosphere means more global warming.
So Biofuels might actually exacerbate the problem they are meant to solve.
Something to think about is we move forward on producing eco-friendly fuels, as one of the scientists put it, we should make sure that our cure isn't worse than the disease.

Thanks for the minute, for scientific American's Sixty Seconds Science
I am Karen Hopkin.
我真心希望能获得守护她的力量
怀着这份心意
我一直静静的凝视着窗外的风景

实现无障碍英语沟通
On skyRo

This is Scientifc American's Sixty-second Science.
I am Karen Hopkin, this'll just take a minute.

For years advocates have touted the use of Biofuels also as a clean burning alternative to gasoline, now a pair of studies published in the Feb 8 issue of Science conclude that Biofuels may do more harm to the environment than good.

The researchers calculated the indirect cost of growing the crops that turned into Biofuels, to plant the corns, sugarcanes and soybeans from which Bio-diesel and Bio-ethanol are made, farmers were first need to clear forest and grass lands, that process turns out would actually generate more carbon dioxide than we save by swearing off fossil fuels.

And we take centuries for us to pay off that Carbon debt.
For example, the scientists figure we take 319 years of using ethanol made from soybeans to make up for the extra carbon released by chopping down the forests needed to grow the crop.

And of course more CO2 to the atmosphere means more global warming.
So Biofuels might actually exacerbate the problem they are meant to solve.
Something to think about is we move forward on producing eco-friendly fuels, as one of the scientists put it, we should make sure that our cure isn't worse than the disease.

Thanks for the minute, for scientific American's Sixty-second Science
I am Karen Hopkin.
普特听力大课堂
on sigrace

This is Scientifc American's Sixty-second Science.
I am Karen Hopkin, this'll just take a minute.

For years advocates have touted the use of Biofuels also as a clean burning alternative to gasoline, now a pair of studies published in the Feb 8 issue of Science conclude that Biofuels may do more harm to the environment than good.

The researchers calculated the indirect cost of growing the crops that turned into Biofuels, to plant the corns, sugarcanes and soybeans from which Bio-diesel and Bio-ethanol are made, farmers were first need to clear forest and grass lands, that process turns out would actually generate more carbon dioxide than we save by swearing off fossil fuels.

And would take centuries for us to pay off that Carbon debt.
For example, the scientists figure we take 319 years of using ethanol made from soybeans to make up for the extra carbon released by chopping down the forests needed to grow the crop.

And of course more CO2 in the atmosphere means more global warming.
So Biofuels might actually exacerbate the problem they are meant to solve.
Something to think about is we move forward on producing eco-friendly fuels, as one of the scientists put it, we should make sure that our cure isn't worse than the disease.

Thanks for the minute, for scientific American's Sixty-second Science
I am Karen Hopkin.
好栏目推荐之美国口语俚语
on avril2006

This is Scientifc American's Sixty-second Science.
I am Karen Hopkin, this'll just take a minute.

For years advocates have touted the use of biofuels as a clean burning alternative to gasoline, now a pair of studies published in the Feb 8 issue of Science conclude that biofuels may do more harm to the environment than good.

The researchers calculated the indirect costs of growing the crops that turned into biofuels. To plant the corn and sugarcane and soybeans from which bio-diesel and bio-ethanol are made, farmers were first need to clear forest and grasslands. That process it turns out would actually generate more carbon dioxide than we save by swearing off fossil fuels and would take centuries for us to pay off that carbon debt.
For example, the scientists figure we take 319 years of using ethanol made from soybeans to make up for the extra carbon released by chopping down the forests needed to grow the crop.

And of course more CO2 in the atmosphere means more global warming.
So Biofuels might actually exacerbate the problem they are meant to solve.
Something to think about is we move forward on producing eco-friendly fuels, as one of the scientists put it, we should make sure that our cure isn't worse than the disease.

Thanks for the minute, for scientific American's Sixty-second Science
I am Karen Hopkin.
Stay foolish. Stay hungry.
For years, advocates have touted that biofuel is such a clean burning alternative to gasolines. Now a pair of study published in Feb eight issue of Science conclude that the biofuel may do more harm to enviroment than good. The researcher caculated that the indirect costs growing the crops that turn into the biofuels. To plant the crops corn and sugarcane and soybeans from which bio-diesel and bio-ethanol are made,farmers would firstly clean the forests and grasslands. That process turns out would generate more carbon dioxide that we save by swearing off our fossil fuel. We take centuries to pay off that carbon debt. For example, the scientists fingure out that we take 319 years of using the ethanol from the soybeens to make up for the extra carbon released by chopping down the forests needed to grow the crops. Of course, more co2 in antermospher means more glabol warming. So biofuel may acutually exaggrate problem than man can solve. Something to think about is we move on forward on producing legal friendly fossfuel. As one of scientists puts it: we should make sure our cure is worth than the disease

on uivb

This is Scientifc American's 60-Second Science.
I am Karen Hopkin, this'll just take a minute.

For years advocates have touted the use of biofuels as a clean burning alternative to gasoline, now a pair of studies published in the Feb 8 issue of Science conclude that biofuels may do more harm to the environment than good.

The researchers calculated the indirect costs of growing the crops that turned into biofuels. To plant the corn or sugarcane or soybeans from which bio-diesel and bio-ethanol are made, farmers were first need to clear forest and grasslands. That process it turns out would actually generate more carbon dioxide than we save by swearing off fossil fuels and would take centuries for us to pay off that carbon debt.
For example, the scientists figure it would take 319 years of using ethanol made from soybeans to make up for the extra carbon released by chopping down the forests needed to grow the crop.

And of course more CO2 in the atmosphere means more global warming.
So Biofuels might actually exacerbate the problem they are meant to solve.
Something to think about is we move forward on producing eco-friendly fuels, as one of the scientists put it, we should make sure that our cure isn't worse than the disease.

Thanks for the minute, for Scientific American's Sixty-Second Science
I am Karen Hopkin.
practise makes perfect
每天半小时 轻松提高英语口语
On cherrysisi
For years, advocates have touted that the use of Biofuel is a clean burning alternative to gasolines.

Now a pair of study published in Feb eight issue of Science conclude that the biofuel may do more harm to environment than good.
The researchers calculated that the indirect costs of growing the crops that turn into the biofuels.

To plant the crops corn and sugarcane and soybeans from which bio-diesel and bio-ethanol are made,farmers would firstly clear the forests and grasslands.
That process turns out would generate more carbon dioxide that we save by swearing off our fossil fuel.
And it would take centuries for us to pay off that carbon debt.
For example, the scientitific figure that we take 319 years of using the ethanol from the soybeans to make up for the extra carbon released by chopping down the forests needed to grow the crops.
Of course, more co2 in atmosphere means more global warming. So biofuel may actually exacerbate the problem they mean to solve.
Something to think about is we move on forward on producing eco friendly fossil and fuel. As one of scientists puts it: we should make sure our cure isn't worse than the disease

you have been somone special to me_______.°`
ON swallow.sunny smile.gif

This is Scientific American's 60-Second Science. I am Karen Hopkin, this'll just take a minute.

For years, advocates have touted the use of biofuels as a clean burning alternative to gasoline, now a pair of studies published in the Feb 8 issue of Science conclude that biofuels may do more harm to the environment than good.

The researchers calculated the indirect costs of growing the crops that turned into biofuels. To plant the corn or sugarcane or soybeans from which bio-diesel and bio-ethanol are made, farmers were first need to clear forest and grasslands. That process it turns out would actually generate more carbon dioxide than we save by swearing off fossil fuels and would take centuries for us to pay off that carbon debt. For example, the scientists figured it would take 319 years of using ethanol made from soybeans to make up for the extra carbon released by chopping down the forests needed to grow the crop. And of course more CO2 in the atmosphere means more global warming. So Biofuels might actually exacerbate the problem they are meant to solve. Something to think about as we move forward on producing eco-friendly fuels, as one of the scientists put it, we should make sure that our cure isn't worse than the disease.

Thanks for the minute, for Scientific American's 60-Second Science. I am Karen Hopkin.
I'm going to be a millionaire!
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