Random PW thread! (part 2)

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You mean CO:D

I should pace myself scientifically when drinking...:unsure:
No I meant CO2 and I found out why.

Although leaves of plants produce oxygen (O2) from CO2 during photosynthesis, their roots need to absorb O2 directly. The high CO2 concentrations in the soil on Mammoth Mountain are killing trees by denying their roots O2 and by interfering with nutrient uptake. In the areas of tree kill, CO2 makes up about 20 to 95% of the gas content of the soil; soil gas normally contains 1% or less CO2.
Invisible CO2 Gas Killing Trees at Mammoth Mountain, California | USGS Volcano Fact Sheet

I didn't know their roots needed to absorb oxygen.
 
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