Apparently there are a few ways to combat global warming, involving "carbon catching". There are two ways that people have suggested to do this.

1) Special trees will be built that catch carbon. As they move in the wind they catch the carbon and trap it, it can then be filtered to give out cleaner air and the carbon is then stored so it is now longer part of the environment. However, it was estimated about 8 billion trees would be needed. Overall about the cost of the Iraq/Afghanistan wars combined.

2) Iron fillings will be dropped into the sea which encourage phytoplankton to grow in greater numbers than usual. For those who don't know phytoplankton are microscopic plants that live in the ocean. They remain near the surface of the water, as that is where there is most light, and because of this they take in large amounts of carbon from the atmosphere. The phytoplankton are eaten by larger fish and so on up the food chain. When the phytoplankton or consumers die they fall to the bottom of the ocean and the carbon is trapped within them.

Do you think its possible/would ever be possible for either of these ideas to work?

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Do I dare
Disturb the universe?
In a minute there is time for decisions and revelations
which a minute will reverse - T.S. Eliot

and I think the second one would do more bad than good

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I WAS CRAYZEELAYDEE! Fear Me! ¬.¬
Californication = LW Husband! Yeah! =D

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i think the first might work but its VERY exoensive

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However, america had the money to spare for the wars. If this was a worldwide effort then that amount could probably be quite easily raised, no?

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Do I dare
Disturb the universe?
In a minute there is time for decisions and revelations
which a minute will reverse - T.S. Eliot

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The first could work but it would cost too much. The second would help one of our enviromental problems, but create a dozen mark.

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I don't really see how solving our ecological problems should have a budget...
If we discovered a way to solve global warming with 100% certainty, and it cost multiple billions of dollars, don't you think it would be worth it? This is not just america involved in this, this is the whole world.

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Life is pleasant. Death is peaceful.It's the transition
that's troublesome.   --Isaac Asimov

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I'm not sure what you're getting at with trees moving through air before filtration. But the science behind dumping iron filings in oceans has been firmly debunked, unfortunately.

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"firmly debunked?" You mean conflicting data. In some studies it has worked in others it has failed. That doesn't equate to "firmly debunked."

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Maybe God doesn't care how you say your prayers,
just as long as you say them- Jeffery Sinclair