Hi Alex. While I admire the fact that you are prepared to...

Hi Alex. While I admire the fact that you are prepared to support your beliefs by not owning WHC, I am surprised that you recommend that others should buy the stock.
I too am not aware of any scientific paper that says 400 ppm CO2 would destroy the planet. However, you might be aware of the climate activist spokesperson Greta Thunberg ("How dare you" speech) and many others who have preached doom and impending destruction of civilisation.
I fail to see your analogy between arsenic and CO2. Ask any politician or greenie what level of CO2 as a percentage of the earths atmosphere they would find acceptable and you will be met with a blank stare. The most naive of the alarmist "save the planet brigade" will say zero. In the absence of CO2 photosynthesis cannot function so all plant life would die out, followed by all creatures dependant on plant life for their existence. Pursuing a zero CO2 policy, if it were possible, would mean the end of human existence.
The prefered level sought by horticulturists to maximise plant growth is in excess of 700 parts per million.