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.
The Earth Scientist, Volume XXV, Issue 2, Summer 2009

$10.00
Articles in the Summer 2009 issue of The Earth Scientist include:
- NESTA 2008 Membership Survey Results, Part 2: NESTA Resources and Programs, by Roberta Johnson
- Linking the Geologic with the Biologic: Ecological Stewardship as a Means to Teach Geology Related to Coastal Land Loss, by Pamela Blanchard
- Building a Model in the Classroom to Illustrate Human Interference with Sand Drift, by Hélder Pereira
- Misconceptions in Astronomy: Identifying Them in Your Students and a New Teaching Resource to Help Address Them, by James McDonald
-
Creationism in the New Texas Standards for Earth
and Space Science, by Steven Newton
Price: $10.00
