Does anyone have any sources that refute this argument against human global warming?

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esp.eclipser

New member
The global average atmospheric CO2 concentration is currently a tiny 387 ppm (parts per million). In the last 600 million years of Earth's history, only the Carboniferous Period (approximately 300 million years ago) and our present age, the Quaternary Period, have witnessed CO2 levels less than 400 ppm.

Commercial greenhouse operators are advised to add enough CO2 to maintain about 1,000 ppm around their plants. Carbon dioxide generators for greenhouse operators produce CO2 by burning liquid propane or natural gas. The healthy plants respond just as plants have responded for most of the history of life on earth when CO2 concentrations were naturally this high, if not higher.

The dinosaurs survived just fine when CO2 concentrations exceeded 2,000 ppm and 450 million years ago, late in the Ordovician Period, the earth went into an Ice Age when carbon dioxide levels exceeded 4,000 ppm—so much for CO2 induced global warming! Coral has thrived throughout these enormous natural climatic and atmospheric changes.

Exhaled human breath contains about 4% CO2. That is 40,000 ppm—levels which some would consider to be concentrated pollution.

(not my words)
 
CO2 is plant food. Concentrations in the atmosphere are trivial. CO2 is used as a way to demonize industry, not because it's the best explanation of any changes in our climate.
 
I am sure they will use their computer models as evidence but you have to wonder why they claim catastrophic warming when it didn't happen in the past. I guess they figure that physical laws have changed. Some even claim that current levels are high and simply don't acknowledge previous concentrations of CO2. It is just an inconvenient truth that must be ignored.

http://www.globalwarmingart.com/wiki/Image:Phanerozoic_Carbon_Dioxide_png
 
Um. Is that an argument?

No one is saying that carbon dioxide itself is bad. No one is saying that we are going to suffocate because of too much CO2 in the air or that the CO2 itself will poison us.

CO2 emissions are bad because of the EFFECT they have--namely, global warming and climate change, along with ocean acidification. This is bad, because it means that the current climate--the climate to which modern human civilization has adapted--will change.
 
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