It is very likely that rising levels of greenhouse gases in the atmosphere resulting from human activity are increasing global temperatures and changing the Earth's climate. Two major greenhouse gases, carbon dioxide and methane, are both carbon based and participate in the global carbon cycle. During this cycle, carbon dioxide from the atmosphere can be taken up by plants via photosynthesis and converted to sugars and other compounds, which can be stored by the plant, used for food by the plant or other organisms, or incorporated into soil, where it can be stored for a long time. Thus, the carbon cycle includes pathways for carbon dioxide to be taken out of the atmosphere and has an important role in global warming and climate change.
This presentation will discuss the carbon cycle, ways that forests and soils store carbon, and how carbon storage and loss from forests and soils might change with changes in climate and human activity.WHEN:
Saturday, Feb. 20, 2010Session 1: 9:30 a.m.
Session 2: 11:15 a.m.
WHERE: Bankhead Theater, 2400 First St., Livermore
NOTE: Seating is on a first-come, first-served basis; there is no pre-registration. Admission is free. Directions, maps and a complete list of lectures are available at http://education.llnl.gov/sos/ Science on Saturday is presented by LLNL's Science Education Program.