[palmer]

It's true that CO2 is critical in its small amounts. One thing I forgot in my previous comment is that almost everything will die with less than 100 ppm.

[100American]

Please take a look at this video and others that speak to the farce that is being perpetrated on mankind about CO2 and carbon

https://www.youtube.com/watch?v=TjlmFr4FMvI&list=PLMcTavhzbeH735rENOkJ6sePJrN8qeQyw