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Author Topic: Graph of the Week Number 2  (Read 99 times)

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Offline rangerrebew

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Graph of the Week Number 2
« on: Today at 07:18:00 am »

Graph of the Week Number 2

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Peter Clack
 
The red line for plant death on earth is around 150 ppm, implying a critical lower limit for CO₂ concentrations below which life would struggle to survive. The optimum CO₂ level for photosynthetic plants & algae is around 1,000 ppm, which last occurred when the first primates arose. Since then, CO₂ levels have been steadily declining. Yet it is still significantly higher than today's 400 ppm, after recovering from a low point of 180 ppm during the glacial optimum 26,000-20,000 years ago.  CO₂ has been trending downwards from 2,750 ppm 160 million years ago, when a coral diversity explosion occurred & when CO₂ levels were significantly higher. This downplays claims that higher CO₂ levels will damage coral reefs.

https://x.com/PeterDClack/status/1967400909484466473
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The unity of government which constitutes you one people is also now dear to you. It is justly so, for it is a main pillar in the edifice of your real independence, the support of your tranquility at home, your peace abroad; of your safety; of your prosperity; of that very liberty which you so highly prize. But as it is easy to foresee that, from different causes and from different quarters, much pains will be taken, many artifices employed to weaken in your minds the conviction of this truth.  George Washington - Farewell Address

Offline rangerrebew

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Re: Graph of the Week Number 2
« Reply #1 on: Today at 07:26:32 am »
The great pyramid of Giza was built 5,000 years ago and is physically here so scientists can study it but still don't know how it was built or exactly why.  It took 20 years to build, a feat which could not be done today with all our current technology.  Yet, scientists are so sure of their knowledge of weather that it is currently considered "settled science" by many, even with the elements of weather being largely intangible except by instrumentation.  My, how science has "progressed." *****rollingeyes*****
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The unity of government which constitutes you one people is also now dear to you. It is justly so, for it is a main pillar in the edifice of your real independence, the support of your tranquility at home, your peace abroad; of your safety; of your prosperity; of that very liberty which you so highly prize. But as it is easy to foresee that, from different causes and from different quarters, much pains will be taken, many artifices employed to weaken in your minds the conviction of this truth.  George Washington - Farewell Address
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