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Politics : Evolution -- Ignore unavailable to you. Want to Upgrade?

To: longnshort who wrote (33794)	3/3/2013 12:48:26 PM
From: Solon	1 Recommendation Respond to of 69300

"it's a scam" That is enough brain exercise for today. You don't wanna risk overload! You better lie down and take a nap! heh heh

To: longnshort who wrote (33794)	3/3/2013 12:49:43 PM
From: average joe	Respond to of 69300

it's a scam Not really. It is a sustainable public business founded on the principles of original sin. It is just like the make believe war on drugs which provides a sustainable level of employment for law enforcement. There is no real war on drugs just a big make believe one to sustain an ever burgeoning federal agency. Global warming is no different and university professors have to eat to.

To: longnshort who wrote (33794)

3/3/2013 1:03:20 PM

From: Solon

2 Recommendations Read Replies (1) | Respond to of 69300

"extra CO2 doesn't amount to a hill of beans"

You are 100% wrong. Start with false facts and foolish opinions, and end with more false facts and ridiculous opinions.

What the science says...

Select a level...	Basic		Intermediate
The natural cycle adds and removes CO2 to keep a balance; humans add extra CO2 without removing any.

Before the industrial revolution, the CO2 content in the air remained quite steady for thousands of years. Natural CO2 is not static, however. It is generated by natural processes, and absorbed by others.

As you can see in Figure 1, natural land and ocean carbon remains roughly in balance and have done so for a long time – and we know this because we can measure historic levels of CO2 in the atmosphere both directly (in ice cores) and indirectly (through proxies).

Figure 1: Global carbon cycle. Numbers represent flux of carbon dioxide in gigatons (Source: Figure 7.3, IPCC AR4).

But consider what happens when moreCO2 is released from outside of the natural carbon cycle – by burning fossil fuels. Although our output of 29 gigatons of CO2 is tiny compared to the 750 gigatons moving through the carbon cycle each year, it adds up because the land and ocean cannot absorb all of the extra CO2. About 40% of this additional CO2 is absorbed. The rest remains in the atmosphere, and as a consequence, atmospheric CO2 is at its highest level in 15 to 20 million years ( Tripati 2009). (A natural change of 100ppm normally takes 5,000 to 20,000 years. The recent increase of 100ppm has taken just 120 years).

Human CO2 emissions upset the natural balance of the carbon cycle. Man-made CO2 in the atmosphere has increased by a third since the pre-industrial era, creating an artificial forcing of global temperatures which is warming the planet. While fossil-fuel derived CO2 is a very small component of the global carbon cycle, the extra CO2 is cumulative because the natural carbon exchange cannot absorb all the additional CO2.

The level of atmospheric CO2 is building up, the additional CO2 is being produced by burning fossil fuels, and that build up is accelerating.

h/t gpwayne.