Reduce old carbon CO2 in the atmosphere, North America has been the biggest producer of old carbon CO2 since the 30’s, although China is catching up and may be the biggest soon. Most of the CO2 put in the atmosphere by burning coal, gas and oil is still in the atmosphere was also the largest economy and people connect the two saying you can’t have one without the other which is fallacy and an excuse. Using fuel the feed-stock made by photosynthesis is the cheapest way for mankind to reduce CO2 in the atmosphere. Without doing that the climate is only going to change more. The seas will rise as the icecaps melt, hurricanes and twisters are powered by the warming seas and atmosphere.