That's just wrong on so many levels. CO2 adds very little to overall energy balance - like <+1W/m^2 average over the year. All the additional heat over spring will disperse through convection because you cannot compare unisolated system (air over spring) and (semi)isolated system (Earth's atmosphere). Also influence of CO2 isn't that straightforward - it causes troposphere to heat up while causing stratosphere to cool down so one random paper about incomparable system cannot explain it's function. Even putting aside effect on climate - 600 ppm of CO2 causes 10-15% decrease in measured intelligence in humans so you may not lose a lot but others may not want to.