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[Yahoo] Biggest jump ever in CO2 emissions - Page 17  

post #161 of 225
Quote:
Originally Posted by Hawk777th View Post
Yes burning Coal, Natural Gas to power the computer you are on right now. Better turn it off you are part of the problem.

Also quit exhaling, that is also contributing to the problem.
The CO2 you exhale does not increase overall levels of CO2. Why? Because all of the carbon you exhale has its origins from photosynthesis in a plant. It doesn't matter if the carbon was acquired by your body from a vegetarian or meat source. The carbon in the meat ultimately came from a plant.

So if you think about it, the CO2 was in the air, a plant absorbed it, it entered the food chain, you eventually burned it, and exhaled it as CO2 again. Net change = zero.

Fossil fuels increase CO2 levels because they are introducing carbon that was previously sequestered from the environment.

This is why biofuels are good for C02 emissions. Yes burning the biofuel releases CO2. But that CO2 was in the air before the biofuel was made. The carbon in the biofuel was made from atmospheric CO2. Just like exhaling CO2, the net change atmospheric CO2 is zero when you burn biofuels.

Learn2carboncycle...


Quote:
Originally Posted by guyladouche View Post
I absolutely hate it when CO2 is associated with any sort of heat-trapping mechanism.

CO2 has other effects, but it has not been shown to contribute AT ALL to any sort of temperature trend on earth.

In order to effect a 1-degree increase in global temperatures, the atmosphere would have to be composed of more than 70% CO2 (because of the way the heat-transport mechanism of CO2 gas works--it's THAT inefficient).

I'm all for doing whatever we can to reduce CO2 output, but not because it has any effect on global temperatures (because it does not).

It is compounded by water vapor. Water vapor is a strong heat trapping source. If you increase the air temperature you increase the amount of water vapor it can hold. So any contribution by CO2 and other greenhouse gasses also brings more water vapor into the air.

At least that is what I've heard people argue.
Edited by Epitope - 11/4/11 at 4:40pm
    
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post #162 of 225
Quote:
Originally Posted by kaxel View Post
If you care to look at any facts, which people don't do much anymore, you can see that on average Chinese vehicles are 50% more fuel efficient than American vehicles.

http://www.pewclimate.org/docUploads...605_110719.pdf
Yes, but fuel efficiency is measured in miles-per-gallon. You can have the most polluting engine get great mileage/efficiency, yet it outputs more pollutants than other cleaner yet less-efficient engines.

And don't forget, cities in China have some of the highest air pollution on earth--not because of cars, but due to industrial activities, but still a comment on the situation.

Diesel engines are very efficient, but unless pretty drastic measures are taken on the emissions/exhaust end, they release more pollutants than gasoline engines--it depends on the situation of whether you get more miles per pollutant, which is not a clear case.

One of the downsides to living in california is the tighter restrictions on engine emissions--you often get less mpg because of this than in other regions (at least, until about 2 years ago--no idea where other states are on this now).

Quote:
Originally Posted by Epitope View Post
It is compounded by water vapor. Water vapor is a strong heat trapping source. If you increase the air temperature you increase the amount of water vapor it can hold. So any contribution by CO2 and other greenhouse gasses also brings more water vapor into the air.

At least that is what I've heard people argue.
That's a good aspect to bring up--I haven't heard this side before. Imma read up on it. I haven't seen studies correlating CO2/green house gasses to atmospheric water content. Interesting.
Edited by guyladouche - 11/4/11 at 4:48pm
    
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post #163 of 225
Quote:
Originally Posted by guyladouche View Post
Yes, but fuel efficiency is measured in miles-per-gallon. You can have the most polluting engine get great mileage/efficiency, yet it outputs more pollutants than other cleaner yet less-efficient engines.

And don't forget, cities in China have some of the highest air pollution on earth--not because of cars, but due to industrial activities, but still a comment on the situation.

Diesel engines are very efficient, but unless pretty drastic measures are taken on the emissions/exhaust end, they release more pollutants than gasoline engines--it depends on the situation of whether you get more miles per pollutant, which is not a clear case.

One of the downsides to living in california is the tighter restrictions on engine emissions--you often get less mpg because of this than in other regions (at least, until about 2 years ago--no idea where other states are on this now).
I am talking about CO2 emissions, not other pollutants. I'm not talking about lead, soot, mercury, or anything else. I am talking about Carbon Dioxide. More fuel efficient cars produce less CO2 than less fuel efficient cars. It is an extremely clear case. Now, regardless of how dirty the air is in Chinese cities, the US emits nearly as much CO2 into the air as China. Together the US and China account for almost half of the worlds CO2 emissions. The world has not failed, China and the US have failed. They are the two biggest holdouts that refuse to join into any binding CO2 emission agreement.
Edited by kaxel - 11/4/11 at 4:52pm
post #164 of 225
It's okay. Aliens will reveal themselves to humanity once again. According to Giogio Tsoukalos, each time Aliens came, some type of nuclear mayhem ensued... BRING ITTT!!!
post #165 of 225
Quote:
Originally Posted by hollowtek View Post
It's okay. Aliens will reveal themselves to humanity once again. According to Giogio Tsoukalos, each time Aliens came, some type of nuclear mayhem ensued... BRING ITTT!!!
They figure if they can get the polluters to kill each other in a nuke fight the Earth will recover after a couple of centuries.
post #166 of 225
yay!
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post #167 of 225
Quote:
Originally Posted by Shadowrunner340 View Post
The planet isn't alive. It's a big rock, and hasn't "given" us anything.
>_________________>
post #168 of 225
Simple, Industrial Ozone-Generators, Industrial C02 Scrubbers, Problem Solved.
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post #169 of 225
Quote:
Originally Posted by HK_47 View Post
Simple, Industrial Ozone-Generators, Industrial C02 Scrubbers, Problem Solved.
Pretty much. Then again, the green house gases are H2O, CO2, CO3, H2SO4, and another one that I am missing. With water being the most abundant as compared to CO2... not even planting a million trees will make a difference (well maybe)
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post #170 of 225
Quote:
Originally Posted by kaxel View Post
I am talking about CO2 emissions, not other pollutants. I'm not talking about lead, soot, mercury, or anything else. I am talking about Carbon Dioxide. More fuel efficient cars produce less CO2 than less fuel efficient cars. It is an extremely clear case. Now, regardless of how dirty the air is in Chinese cities, the US emits nearly as much CO2 into the air as China. Together the US and China account for almost half of the worlds CO2 emissions. The world has not failed, China and the US have failed. They are the two biggest holdouts that refuse to join into any binding CO2 emission agreement.
CO2 is the product of combustion--the more efficient you make a combustion engine, more CO2 will be produced. Granted, for the incomplete combustion engines we use, there are other by-products/"pollutants" but anything you do to make a combustion more efficient will generate more CO2.

Better fuel efficiency doesn't necessarily equate to less CO2 produced, and the closer you get to a perfectly efficient combustion engine, the more CO2 you will produce.

I hate the term, but all one can do is improve the carbon footprint--you can't reduce the amount of CO2 you generate when you make more efficient engines, all you can do is maximize the amount of work they can do.
    
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