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| the dark side of cobalt |
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| nctnico:
--- Quote from: tom66 on July 14, 2023, 06:50:03 am --- --- Quote from: nctnico on July 13, 2023, 05:46:34 pm --- --- Quote from: connectTek on July 13, 2023, 09:58:00 am ---During the Triassic period it was 4000ppm, 10 times higher than today. The world never ended. CO2 is plant food, NOT a dangerous gas. 200ppm to 400ppm a %50 increase, sounds bad. --- End quote --- Geez, get your math straight. From 200ppm to 400ppm is a 100% increase. Secondly, CO2 starts to become problematic (toxic) to humans starting from concentrations of 1000ppm. Above that level things like concentration problems start to occur and ultimately death. CO2 is a toxic gas to most animals. And plants don't like a lot of CO2 either. Optimum is between 800ppm and 1500ppm --- End quote --- The idea that CO2 is "fine" and is not really worth worrying about because plants will love it is something that started in the US, I think. Because it's now undeniable that CO2 is rising, and that humans are causing that rise, but "Plants love CO2! So it is not bad!". It fails some of the most basic tests, like, ok, even if plants love it, do we, what about atmospheric temperatures, what about the oceans? Plants may well thrive in 2000ppm CO2, but I think we will be mostly dead! --- End quote --- Actually there is something else to be worried about. If you look at CO2 levels from ice core drillings, you'll see a sharp peak every 40k years (IIRC; super exact number doesn't matter). What matter is that at this point in time we are right at the point where such a peak is supposed to occur. So there are 2 possible scenarios here: 1) human activity is amplifying the natural CO2 peak and even with CO2 emission reductions the level will rise to higher levels or 2) the natural peak hasn't happened yet and we (humans) have made the situation quite bad already so the natural CO2 peak becomes a double whammy. I have not investigated in the how & why the natural CO2 peaks occured in the past. It would be interesting to find out what the mechanism behind it is. Melting permafrost perhaps? And for sure earth will continue to circle around the sun but changes in the climate will reduce the amount of land people & animals can live on drastically both by rising sea levels and deserts getting larger. |
| Karel:
--- Quote ---f you look at CO2 levels from ice core drillings, you'll see a sharp peak every 40k years (IIRC; super exact number doesn't matter). What matter is that at this point in time we are right at the point where such a peak is supposed to occur. So there are 2 possible scenarios here: --- End quote --- Possibility 3: We are at the peak and once we passed it, CO2 levels will go down, no need to worry :popcorn: |
| tszaboo:
In an alternate reality, mankind is intentionally increasing the temperature, so the vast tundras and taigas become habitable and good for agriculture. In yet an alternative reality Earth is broken down to build a Dyson ring. I can tell you one thing: This is an engineering problem, and the solution is not going to come from politicians, or 17 year old autistic children. So I'm just going back to my work, increasing the efficiency of the transportation of chemicals. Just a bit. You guys go ahead and do the same in your field, and we might just make it. |
| TimFox:
Note that whatever is causing climate change, it will hit different parts of the Earth differently. That is bound to increase migration from worsened regions to more temperate climes. What could go wrong? |
| Siwastaja:
--- Quote from: Karel on July 14, 2023, 03:52:35 pm --- --- Quote ---f you look at CO2 levels from ice core drillings, you'll see a sharp peak every 40k years (IIRC; super exact number doesn't matter). What matter is that at this point in time we are right at the point where such a peak is supposed to occur. So there are 2 possible scenarios here: --- End quote --- Possibility 3: We are at the peak and once we passed it, CO2 levels will go down, no need to worry :popcorn: --- End quote --- The shape of the current peak is different than those occurring earlier, which are like sinusoidal wavelets. Now it has increased with like 10x the rate or so. That is why Possibility 3 seems unlikely. (But of course, even this is oversimplifying a complex matter; and panic is of no help; actions should be both effective and not unnecessarily limiting.) |
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