dohboi wrote:This is not talking about temporary levels, like when you walk into a pot-growing greenhouse, lol.
This is about what happens when you are permanently exposed to these conditions.
Even if his exact values may be set low, that increases in CO2 concentrations can have direct negative influences on human health and ability to function seems to be confirmed by other studies:
At 1,000 ppm CO2, compared to 600 ppm, performance was significantly diminished on six of nine metrics of decision-making performance. At 2,500 ppm CO2, compared to 600 ppm, performance was significantly reduced in seven of nine metrics of performance, with percentile ranks for some performance metrics decreasing to levels associated with marginal or dysfunctional performance.
http://escholarship.org/uc/item/222631x2
That may be, but getting all alarmist about it now smacks of the kind of claims that people make about massive numbers of "children starving in America". More politics than substance (in the SHORT term).
To me, this is another example of a negative impact of CO2. i.e. it's not just AGW that we need to worry about. So for this particular problem, if it turns out to be real, then over time, some sort of (say) drug or dietary therapy will be needed to (at least mostly) counteract the effect on the blood.
Somewhere between "doom" and "happy motoring forever", for this particular issue.
...
Naturally, as more and more of these problems surface, and things like AGW get worse and worse, and humanity merrily/stupidly continues to make the CO2 problem worse instead of meaningfully dealing with it -- the system eventually won't be able to cope with it. And I find it personally terrifying for humanity that we have no clue as to how rapidly this will occur, but the threat of the feedback mechanisms (that we already know about, much less all the others that are bound to exist) seems to worsen rather rapidly.
So when such problems are considered in aggregate, then IMO, just saying "nothing to see here" is far from an adequate response.
Given the track record of the perma-doomer blogs, I wouldn't bet a fast crash doomer's money on their predictions.