The last time the earth had CO2 levels of 400 parts per million homo sapiens had not arrived, and the earth was 14°F warmer than today. FOURTEEN. Tomato's and sweet corn die long before it gets 125-130°.
A study made public in Oslo by scientist in Britain, Columbia, Australia, predict 57% of plants species and 34% animal species will be driven from the zone they live in by heat and CO2 rises. Only 4 percent of plants will benefit from it.
Poision Ivy is one of a very few plants that benefits, grown in high levels of CO2, it grows bigger, faster and the toxic oil more potent. Enjoy.