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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: J_F_Shepard who wrote (825203)	12/24/2014 10:31:10 AM
From: Brumar89	1 Recommendation Recommended By FJB Read Replies (1) \| Respond to of 1578743

We have no idea what limit is safe. We DO know however that during the last ice age, trees found at the La Brea tar pits were showing signs of carbon starvation. That suggests we're much closer to the LOW limit of what is safe than the high limit. We know from fossilized plants found at La Brea that during the last ice age plants were stressed by carbon starvation. Carbon has been being buried by geological processes for many millions of years and the CO2 level in the atmosphere is very low, not far above the level at which plants start dying. Carbon starvation in glacial trees recovered from the La Brea tar pits, southern California Pertenece a: PubMed Central (PMC) PubMed Central (PMC3 - NLM DTD) Descripción: The Rancho La Brea tar pit fossil collection includes Juniperus (C3) wood specimens that 14C date between 7.7 and 55 thousand years (kyr) B.P., providing a constrained record of plant response for southern California during the last glacial period. Atmospheric CO2 concentration ([CO2]) ranged between 180 and 220 ppm during glacial periods, rose to ?280 ppm before the industrial period, and is currently approaching 380 ppmin the modern atmosphere. Here we report on ?13C of Juniperus wood cellulose, and show that glacial and modern trees were operating at similar leaf-intercellular [CO2](ci)/atmospheric [CO2](ca) values. As a result, glacial trees were operating at ci values much closer to the CO2-compensation point for C3 photosynthesis than modern trees, indicating that glacial trees were undergoing carbon starvation. In addition, we modeled relative humidity by using ?18O of cellulose from the same Juniperus specimens and found that glacial humidity was ?10% higher than that in modern times, indicating that differences in vapor-pressure deficits did not impose additional constrictions on ci/ca in the past. By scaling ancient ci values to plant growth by using modern relationships, we found evidence that C3 primary productivity was greatly diminished in southern California during the last glacial period. http://biblioteca.universia.net/html_bura/ficha/params/title/carbon-starvation-in-glacial-trees-recovered-from-the-brea-tar/id/912067.html Greenhouses boost the natural level of CO2 to promote plant growth and health. No harm to greenhouse workers. (NaturalNews) For only "pennies a day," any greenhouse owner can produce CO2 to help increase plant yields in their greenhouses. That's the message on CO2 generators sold by greenhouse supply companies across the United States and Canada. "1,500 ppm [of carbon dioxide] can be achieved... these generators automatically provide the carbon dioxide needed to meet maximum growing potential for only pennies a day," the ad says. View it yourself in this picture taken from a greenhouse supply magazine: http://www.naturalnews.com/images/CO2-Genera... ............ Here's the ad so you can see it for yourself: Learn more: http://www.naturalnews.com/040890_greenhouses_carbon_dioxide_generators_plant_growth.html#ixzz3MpTY5pHb ............ Indoor grown marijuana is grown under unnatural CO2 concentrations and you don't hear Rat or bentway or koan warning that this dangerous to growers or users. Submariners live and work with CO2 concentrations of 8-10K ppm. Many times higher than in the atmosphere. No harm done.

To: J_F_Shepard who wrote (825203)	12/24/2014 12:41:05 PM
From: Brumar89	Read Replies (1) \| Respond to of 1578743

Town Uses Letter of the Law To Have Childish Nativity Scene Removed by BFH • 12/24/2014 • 17 Comments An “atheist” -a disbeliever not content with merely not believing, but someone who insists on being insulting – put up the nativity scene seen above, and the town is asking for it to be taken down. They’re citing city ordinances which the structure violates. The ProgressiveSecularHumanist has some disgruntled commenters. One of them said, “how much do you want to bet that if it was a traditional nativity nobody would have said diddly?” You figured that out all on your own, didja? Most towns like representations that motivates its citizens toward civility, The Ten Commandments, peace, warmth and goodness. You know, the sort of things atheists claim they stand for… when they’re not displaying flesh eating zombies. Most people grow out of that period when they try to “shock the elders” in order to prove that the boy who was once in the short pants can now speak when not spoken to. Not atheists, though. HT/ FDR in HELL Read more at http://iotwreport.com/?p=267440#f8HlpMlIp2h3Puid.99