The chart below comes from NOAA (the National Oceanographic…

The chаrt belоw cоmes frоm NOAA (the Nаtionаl Oceanographic and Atmospheric Administration) and it shows the continuous, steady increase in concentration of CO2 in Earth's atmosphere.  As of April 2023, the average concentration is 421 ppm. Current analysis suggests that if we are to have at least a 50% chance of avoiding the most extreme and dangerous impacts of climate change we must constrain the average increase in global temperature to less than [Answer1] degrees Celsius.  To do that, we must keep CO2 concentrations in our atmosphere below [Answer2]  ppm.