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Posted: Sat Oct 07, 2006 11:59 pm
Humans aren't causing massive or huge tons of CO2 to collect in the atmosphere. But that doesn't mean we aren't contributing. Quote: Compared to man-made sources' emission of about 5 to 6 billion tons per year, the natural sources would then account for more than 95 percent of all atmospheric carbon dioxide, Essenhigh said. "At 6 billion tons, humans are then responsible for a comparatively small amount - less than 5 percent - of atmospheric carbon dioxide," he said. "And if nature is the source of the rest of the carbon dioxide, then it is difficult to see that man-made carbon dioxide can be driving the rising temperatures. In fact, I don't believe it does." http://www.sciencedaily.com/releases/2001/06/010615071248.htmFrom the numbers he argues it would appear that humans are pumping out about 5% of the world's CO2. But whether or not we're the real problem is hardly the point. I believe in this thread your point was that global warming is a threat, and it will be a threat now? Yes, I agree to that. And it will certainly impact us in the future. CO2 isn't something you can just get rid of, it will take a massive move from all of the nations in the world working together to stop pumping out these emissions. We aren't doing much now, but that doesn't mean we should keep going. I do believe Professor Essenhigh is onto something here. But, like I said, how much we contribute is beside the point. The fact is, it's happening now. Essenhigh has a slightly more optimistic view about it: Quote: As to why highs and lows follow a 100,000 year cycle, the explanation Essenhigh uses is that the Arctic Ocean acts as a giant temperature regulator, an idea known as the "Arctic Ocean Model." This model first appeared over 30 years ago and is well presented in the 1974 book Weather Machine: How our weather works and why it is changing, by Nigel Calder, a former editor of New Scientist magazine. According to this model, when the Arctic Ocean is frozen over, as it is today, Essenhigh said, it prevents evaporation of water that would otherwise escape to the atmosphere and then return as snow. When there is less snow to replenish the Arctic ice cap, the cap may start to shrink. That could be the cause behind the retreat of the Arctic ice cap that scientists are documenting today, Essenhigh said. As the ice cap melts, the earth warms, until the Arctic Ocean opens again. Once enough water is available by evaporation from the ocean into the atmosphere, snows can begin to replenish the ice cap. At that point, the Arctic ice begins to expand, the global temperature can then start to reverse, and the earth can start re-entry to a new ice age. According to Essenhigh's estimations, Earth may reach a peak in the current temperature profile within the next 10 to 20 years, and then it could begin to cool into a new ice age. http://www.sciencedaily.com/releases/2001/06/010615071248.htmI believe that is a painfully optimistic view about global warming. And I also believe that whatever we can do to lower CO2 emissions would be a good idea. Especially since most of those CO2 emissions is coming from our cars, and factories, and buildings. However, is North America the one to blame for this? Not entirely, the blame, as some may say should also be directed towards developing nations as well. And here is where the Kyoto Accord is failing. Although North America does account for a large portion of CO2 pollution, the numbers set out by Kyoto omits developing nations, and specifically targets industrial nations such as those in North America and parts of Europe. Kyoto Accord (PDF)Why is this a problem? Although industrial nations are large contributors to CO2 emissions, it is estimated that developing nations will soon become the world's largest consumers of oil and fossil fuels. More consumption for those productions, of course, leads to more CO2 emissions from them. China, in particular, is a huge worry right now. The country is developing at a rapid pace, and once it is done growing, it will be a big mouth to feed. A similar concern can also be applied to India. Stopping these nations from developing is simply impossible. That's just asking for a war to start. But there is hope on the horizon: Quote: So, if nothing can be done to reduce CO2, should we quit worrying, buy SUVs, and party on? On the contrary. Fossil fuels are to the developing world today what the American forest was to this country two centuries ago--a cheap, easily exploited resource that permits extraordinary economic growth for the short time that it lasts. The U.S., through its huge trade deficits and job exports, is now financing the industrialization of Asia, a result we didn't intend but may as well make the most of--clearly we want teeming nations like China, India, and Indonesia to become prosperous, stable societies. Making that happen, though, will take decades of steady investment and jigawatts of energy, the price of which will climb steeply once fossil fuels run out. Hastening that none-too-distant day through frivolous use of the supplies we now have would be stupid (although fossil fuel depletion will also end the emissions problem). A more realistic approach is to say, OK, we're going to burn this fuel and cope with whatever dire result, but let's put the stuff to good use while we've got it. That means distributing improved technology to use energy more efficiently and pollute less. Amazingly, just such an approach was agreed to last year when the U.S., Australia, China, India, Japan, and South Korea formed the Asia-Pacific Partnership on Clean Development and Climate, which may go down as Dubya's saving grace after having screwed the pooch in Iraq. http://www.straightdope.com/columns/060407.htmlAs for what I personally think? Whatever happens in the future, I just hope it works out. I don't always do my part to avoid polluting the planet. But it's difficult to imagine cutting a few things out of my life. We're all a little too used to convenience.
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Posted: Tue Oct 10, 2006 5:01 am
The atmospheric record found in the artic shows pretty plainly that it only takes a very small change in the amount of carbon dioxide in the atmosphere to drastically change world temperatures. Trying to deny global warming by saying that "only" five percent of the carbon dioxide being released is unnatural and made by human sources is another one of those meaningless figures without looking at what 5% might actually mean to the planet.
Rotting leaves are natural and have always been there. The planet can handle it. Massive factories and billions of automobiles, on the other hand, is more debateable.
Also, though the above poster made some good points, I do tend to disagree that it's beside the point whether or not humans are contributing to global warming. It, to me, is the main issue. If we are contributing, there are things we can do to stop or reverse our impact (for the time being.) If we aren't, or believe we aren't, then everyone feels they have a license to throw up their hands and say, "Nothing I can do!"
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Posted: Tue Oct 10, 2006 1:48 pm
Martian Princess Also, though the above poster made some good points, I do tend to disagree that it's beside the point whether or not humans are contributing to global warming. It, to me, is the main issue. If we are contributing, there are things we can do to stop or reverse our impact (for the time being.) If we aren't, or believe we aren't, then everyone feels they have a license to throw up their hands and say, "Nothing I can do!" Not exactly what I was trying to say. It's not that there's nothing I can do about it. It's more of an argument on whether or not I feel like dedicating my time to it (but that's a whole nother issue). What I meant was, the CO2 is out there now, it's up there, and with the problems we face in trying to stop it, there's realistically nothing we can do as individuals, or even as an entire nation, or even as far as an entire group of industrial nations. Even if everyone in an industrialized nation stopped putting out CO2 emissions completely, there will always be other nations that will put out the fumes. Developing countries will still need oil and gas, and fuel for their growing economies, and the only thing we can really do is soften the blow. We can't cut off their supply to fuel because that's both cruel and would probably lead to a lot of war and even more hatred towards industrialized nations. There's basically no good or easy way to tell countries like China that we can't give them the fuel they need to better their lives because we need the fuel to make a magical new source of fuel that isn't polluting the world. They're not going to buy it, and they're definitely not going to put a hold on their industrial revolution for us. That's pretty much what I meant. Sorry if my comment was confusing in any way. 3nodding
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Posted: Wed Oct 11, 2006 1:50 pm
Okay, I see your point, but I don't believe it's at all true that there's nothing anyone can do. If industrial nations take the lead and develop cheap sources of alternative energy, developing nations will be fast to follow: gas prices are continually rising, and one thing a developing nation can't afford is to ignore cheaper alternatives, especially when they are trying to compete or aiming for competition in the world economy with already developed nations. Sure, there's nothing stopping them legally from continuing to use fossil fuels, but common sense and economics might help.
Besides, China has a higher fuel standard than the US, at least as far as cars are concerned. Why shouldn't we challenge ourselves to at least match their progress?
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Posted: Sun Oct 15, 2006 7:37 pm
i agree with martian, the majority of americans arnt doing crap to help with the situation
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Posted: Sat Oct 21, 2006 11:42 am
Global warming is natural. I'm not saying that humans don't help it along, but seriously... the polar ice caps used to come down past New York. Don't you think that it wouldn't make sense for them to suddenly stop shrinking? And even before fossil fuels the world was getting warmer all the time. Humans may speed up the process a bit, but I don't think we have anything to worry about.
Now, polution's another story. Smog'll kill us all. And the stuff we do to our water is just the pinacle of human stupidity.
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Posted: Tue Oct 24, 2006 5:03 am
we need to do somthing NOW!!!!! or else we're all DEAD!! the planet won't last forever
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Posted: Thu Oct 26, 2006 5:01 pm
I heard the ozone hole shrinks and grows naturally from time to time....
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Posted: Thu Oct 26, 2006 11:48 pm
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Posted: Fri Oct 27, 2006 4:34 am
Want to know where the jobs are going to be in the future?
Follow the global warming.
I was listening to a radio program this morning detailing how Alaska's infrastructure, which was built entirely on permafrost, is now buckling and crumbling because that permafrost is melting into freshwater soup. Entire highway systems, house foundations, etc, are beginning to buckle and fall.
Go to engineering school, then head out to Alaska if you want to make a difference in people's lives (as well as make a very decent living).
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High-functioning Cutesmasher
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Posted: Mon Nov 06, 2006 6:26 pm
I agree with the permafrost thing, its a good idea, but i doubt many are going to follow it,
as for a totally off topic thing
saddams going to hang!
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Posted: Wed Nov 08, 2006 3:36 pm
I am in enviornmaental science in my school. So I learn about global warming. Global warming is the traping of the heat on the Earth by the green house gases(carbon dioxcide, water vapor, methane, and nitrous oxcide). The green hose gases form a cover around the Earth which traps the heat causing the polar ice caps to melt. With that happening, the sea levels will rise flooding the Earth and reducing landspace. Imagine this, take a picture a the U.S., draw a line in about 250 ft. starting at Florida and going up the east coast, color in everything under that line. Sea levels might rise abouut 250 ft. and anything that is not colored in, that is what will be left of the U.S.
Now, for some strange reason, my dad thinks there is no such thing as global warming.
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Posted: Mon Nov 13, 2006 5:09 pm
First off, for everybody who does not beleive in global warming, even though people have already talked to you:
Yes, for now global warning may be just a theory, BUT it IS true that the CO2 level is rising. For now can you not invade threads and tell people off for trying to give the world what they think?
Now for my talk:
I agree with everything that you said, but with people taking down trees I have something else to add.
Now when you cut down trees, you only take away the things that take away the carbon dioxide and put in oxigen. However, when you start burning down trees, which is what some people do so that they don't have to uproot the stumps. What that does is release the CO2 that the tree had inside itself at the current time, adding to the CO2 in the air multiplyed by however many trees were burned down. Don't we have enough forest fires to burn down our forests? Plus the rainforests are being taken down by the day.
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Posted: Tue Nov 14, 2006 4:14 am
demoness13 First off, for everybody who does not beleive in global warming, even though people have already talked to you:
Yes, for now global warning may be just a theory, BUT it IS true that the CO2 level is rising. For now can you not invade threads and tell people off for trying to give the world what they think?
Now for my talk:
I agree with everything that you said, but with people taking down trees I have something else to add.
Now when you cut down trees, you only take away the things that take away the carbon dioxide and put in oxigen. However, when you start burning down trees, which is what some people do so that they don't have to uproot the stumps. What that does is release the CO2 that the tree had inside itself at the current time, adding to the CO2 in the air multiplyed by however many trees were burned down. Don't we have enough forest fires to burn down our forests? Plus the rainforests are being taken down by the day. And that is very bad considering that CO2 is the main greenhouse gas that is trapping heat on the durface of the Earth.
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Posted: Thu Nov 16, 2006 7:29 pm
I'm confused. CO2 is what we breathe out, isn't it? So we're polluting the air just by breathing??? gonk crying
And I thought cars emmitted Carbon Minoxcide, not CO2???
I'm lost gonk
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