Please help I need to get this done! Go to the NOAA website (https://www. esrl. noaa. gov/gmd/ccgg/trends/mlo. html) and look at the most recent carbon dioxide level measured. The highest level of carbon dioxide reached in the last 800,000 years was about 300 ppm. How much higher is the current carbon dioxide level than the previous peak value of 300 ppm? You need to subtract this by 300.