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.
Publications
NESTA offers publications that serve the K-12 Earth and Space Science classroom teacher.
These include:
- The Earth Scientist, our quarterly journal which is either available in PDF format on the website or mailed to members (depending on the membership options they chose), and
- our monthly electronic newsletter, NESTA ENews.
