Atmospheric CO2 will pass an alarming milestone in 2021

Atmospheric CO2 will continue to rise simply because we cannot stop using carbon for energy all at once. For zero emissions to be reached it will take many years to make the transition to alternative sources, especially in transportation. By that time the atmosphere could be as high as 500 ppm. Nor can we stop it by taking CO2 directly out of the air and burying it somewhere... the NET-zero approach. Preparing for this will require adaptations, regardless of what the climate does. CO2 mitigation will not work.