During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm repeatedly. Daily levels of CO2 can vary due to weather, and there are seasonal trends as well.
My NESTA
My NESTA is a space for NESTA members to keep track of events, educational resources and opportunities of interest to them. My NESTA information can be presented in calendar (at daily, weekly, or monthly format) as well as in list format.
