Quote:
Originally Posted by Dr Terry
Spot on. CO2 is plant food, it's not a pollutant/hazard.
HCs & Oxides of Nitrogen, along with Diesel particulates are a hazard to humans.
Dr Terry
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Yes it is a plant food but has shown to stunt tree growth when levels do get to high and even kill them, A CSIRO study in the 90's showed this.
It's like saying water is needed to keep you alive. Yes it is but if you drink to much, you can/will die.