What is That Threshold?
And climate advocates wonder why the public is confused about global warming. Thus writes David Biello in SciAm:
https://yourartbeat.net/2025/03/11/r661se1https://www.plantillaslago.com/8vkus964 Despite decades of effort, scientists do not know precisely what temperatures or greenhouse gas concentrations in the atmosphere constitute a danger.
https://www.scarpellino.com/mg7y6widnxe
Biello goes on to survey leading climate scientists on various threshold levels, who bascially throw up their hands, (except, of course, James Hansen). Among others quoted, Columbia University’s Wallace Broecker continues to talk about the inevitably of some frightening numbers:
https://www.mdifitness.com/v3yfjx3iykhttps://hazenfoundation.org/mby9d8kbw6n We’re at 387 now and we’re going up at two ppm per year. That means 450 is only 30 years away. We’d be lucky if we could stop at 550.
https://www.salernoformazione.com/gqqx4tr The reason scientists don’t know “precisely what temperatures or greenhouse gas concentrations in the atmosphere constitute a dange” is that there is no precise level that constitutes a danger.
Try substituting some words in that sentence:
Ambien For Sale OnlineDespite decades of effort, physicians and medical scientists do not know precisely what blood pressure constitutes a danger.
https://www.plantillaslago.com/56cy6uo5fr8https://www.varesewedding.com/t05fxh4gzn Despite decades of effort, environmental scientists do not know precisely what air pollution concentration constitutes a danger.
I could go on, but I think the shallowness of the original comment is indicated.
Or what if rewrote the numbers using percentages of atmospheric volume (not including water vapor) instead of parts per million. Then it would read:
https://www.andrewlhicksjrfoundation.org/uncategorized/axxzh33d We’re at 0.000387% now and we’re going up at 0.000002% per year. That means 0.00045% is only 30 years away. We’d be lucky if we could stop at 0.00055%.
https://www.infoturismiamoci.com/2025/03/xcy6nynq6 Ah yes, 0.0000000001% sure sounds tiny, but if I counted zeros correctly, that is a lethal dose of tetanus toxin. 1 nanogram per kilogram.
https://www.emilymunday.co.uk/ysgiejs4vdaOf course, the effect of tetanus toxin is well known as we can poison mice. It is hard to see how we do the equivalent experiment on our climate. Or why we would want to. Or why we are.
https://www.varesewedding.com/ccrgg0jz56