We Are In A CO2 Famine - CO2 Has Been Declining for 160 Million Years - Excellent Graph

The CO2 red line for plant death on Earth is around 150 ppm...During the last Glacial Maximum (20,000 years ago) CO2 was 180 ppm...The optimum CO2 level for plants is around 1,000 ppm...CO2 today is 422 ppm...