I'll answer in order:
Quite possibly. I could but you'd just dismiss it and ask for more. Because it could kill us all? There's a lot of debate about this. Just because it's happened before doesn't mean it couldn't happen again with a different cause. You already asked this, see sentence 2.
2007-02-10 16:22:06
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answer #1
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answered by w00t 3
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Ice core samples from the south pole show that the earth has gone through warm spells and cold spells. Global warming statistics are based on yearly averages, but there are a lot of fluctuations, record setting cold, rain, snow, heat, drought, etc. of late, but the averages show slight increases in recent years. If these increases continue then there could be problems, but it is just as possible that these increases are only temporary and could reverse themselves in the near future. There is a lot of number crunching that goes on, but whether it relates to weather or something else I've always been told that liars figure and figures lie. It really depends on how you group the number together. Volcanos spew more green house gases into the air every year than is generated from man made sources, so it could be the earth that is causing the change. As for your last question: People care because of all the money they have invested into beach front development and the economic cost of relocating. Yes, some areas may become more arid, but some areas that are currently too cold to be used for agriculture would become available. There is a lot of good land in Alaska. But people have settled where there are good resources and we are no longer as nomadic as our ancestors and don't want to move to better regions. That is why people 'give a dam.'
2007-02-10 16:38:13
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answer #2
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answered by haykat 2
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Yes, global warming is happening. The strange weather patterns and increased heat are definite signs. It is man- made, as we create smoke and greenhouse gases, which, in turn, cover the ozone layer and makes it harder for the Sun's rays to escape the Earth. There is no hole in the ozone layer, if there was, it would be extremely hot in the position of the hole. People give a damn because if nothing is done, we can die. I don't know what's taking them so long to find an alternative to greenhouse gas emissions, maybe they can find an alternative energy source to eliminate smoke completely. Also, a good explanation of this can be found on "An Inconvenient Truth", a film featuring Al Gore. The film gives an in- depth look at the world and the global warming problem.
2007-02-10 16:25:47
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answer #3
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answered by Anonymous
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It is happening, the amount of co2, methane, and other greenhouse gases we released into the atmosphere over the last 50 years have been a tremodous contribution to trapping the heat that would normally escape back into space. If you look into average annual temperatures at NOAA.gov you'll see that there is a trend of higher Ocean Surface Temp and higher temperature averages in the US.
You should care because in the near future your world and the world your shildren will live in will be very different. A world faced with famine, and mass migration of people away from current coastal cities everyone will be affected.
2007-02-10 16:42:58
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answer #4
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answered by jutau00 2
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Here's proof that it's happening and caused by man. Look at the graphs on pages 3,4,6, and 10.
http://www.ipcc.ch/SPM2feb07.pdf
People care because it threatens to do really bad things. Coastal cities will flood and we'll lose hundreds of billions of dollars of stuff we've built along the coast. Agriculture will be damaged by changes in precipitation and temperature. We'll spend a lot more to deal with that. The changes in our life we'd suffer when it hits hard would be a lot worse than what we'd have to do to take action to reduce the worst of it. In poor countries, which are already struggling to feed themselves, many people will die of starvation if we do nothing.
Al Gore has nothing to do with the science. He's just carrying the message from the scientists.
2007-02-10 19:26:29
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answer #5
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answered by Bob 7
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It is really happening. The North American ice sheets reached their largest expanse about 18,000 years ago and then began to recede. Within 5,000 years they had pulled back considerably but still reached south as far as central Ohio. After another 1,000 years, however, the U.S. was largely ice-free.
The current debate however is not whether the earth's temperature is rising; it almost certainly is. The debatable issue is whether it is result of man-made actions. Some of the answers offered here also contain heavy biases against big companies and politicians. This is a subject matter that few actually know about but all of us feel entitled to give opinions about. In truth, even scientists are split about this question. If you read the news, one day some thousands of scientists will back up one theory; the next day, some thousands will back up the opposite theory.
In 1997, in Kyoto, delegates of 189 countries met to discuss global climate change and they could hardly vote to do nothing. So they decided to order a reduction man-made greenhouse gases. At the top of the man-made greenhouse gases is CO2.
The atmosphere is primarily composed of nitrogen (78%), oxygen (21 %) and CO2 (0.04%). Many other gases are present in trace amounts. The lower atmosphere also contains varying amounts of water vapor, up to 4% by volume. Nitrogen and oxygen are not greenhouse gases and have no warming influence (you see, the greenhouse gases included in the Kyoto Protocol are each rated for warming potency). CO2, the warming gas about which many are worried, has low warming potency, but its relatively high concentration makes it responsible for 72 % of Kyoto warming. Methane gas (CH2 or "natural gas") is 21 times more potent than CO2, but because of its low concentration, it contributes only 7% of that warming. Nitrous oxide (N2O), most of which is not man made, is 310 times more potent than CO2, but its low concentration keeps its warming effect down to 19 %.
HOWEVER, nature itself generates about 30 times as much CO2 as does man. Enviromentalists will usually ignore the fact that only 3.2% of the total CO2 is man-made ("anthropogenic CO2"). They will only point out that the US generated about 23% of the world's anthropogenic CO2 in 2003, which sounds pretty scary.
But there's more: CO2's contribution to the greenhouse effect is even smaller when you take into consideration water vapor. If you do, all the greenhouse gases together, including CO2 and methane, produce less than 2% of the total greenhouse effect. With water vapor factored in, then anthropogenic CO2 produces less than 0.1 of 1% of the greenhouse effect. Everyone knows that water vapor - which is almost entirely natural - is the dominant greenhouse gas, yet many environmentalists will ignore this fact.
In conclusion, there is not much that can be made to revert global warming, as it is mostly a natural phenomenon, and man-made contribution is neglectible. Eliminate entirely man-made greenhouse gases, and you still have an enourmous amount of naturally made greenhouse gases.
2007-02-10 16:52:36
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answer #6
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answered by maubrenes 2
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Your question would indicate you have some mental difficulties , but maybe in your case it is mercury toxicity ?
That should make you happy because mercury poisoning is not caused by global warming !
And you don't really have to care about it because when the weather extremes shred your house , you won't be able to stop it , so just go with it !
2007-02-10 16:56:29
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answer #7
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answered by kate 7
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I think global warming is a bunch of bull. But scientifically, it's a bad threat. It's part from the natural absorbtion from the sun and part from pollution. It's when we get so hot, glaciers at the north pole melt, raising water levels, flooding land.
2007-02-10 16:22:56
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answer #8
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answered by Alex 2
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Well, I'm an energy saver, girl! I turn of lights when needed, and I usually use solar calculators. =) lolz. Look:
WE CAN CALL BE A PART 0F S0LAR ENERGY, AND SAVING THE GL0BAL WARMING FOREVER BY TURNING OF LIGHTS, AND D0ING 0THER THINGS THAN USING ELECTRICITY! AND THE C0MPUTER!
2007-02-10 16:23:03
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answer #9
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answered by Sunset :]] 4
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Here are 2 websites that can probably answer your many questions:
http://www.earth911.org/master.asp?s=lib&a=globalwarming/default.asp
http://www.environmentaldefense.org/page.cfm?tagID=1011
I agree with 'demigodz' watch Al Gore's "An Inconveinent Truth" on DVD!
2007-02-10 16:30:56
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answer #10
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answered by Anonymous
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