Truth Fact #2

Every year the, CO2 level goes up and down

1. http://www.esrl.noaa.gov/gmd/ccgg/trends/

• Dr. Pieter Tans, NOAA/ESRL (www.esrl.noaa.gov/gmd/ccgg/trends)
• Earth System Research Laboratory
• very credible from a science laboratory
• it show a graph how every year the level of CO2 goes up and down
• Yes
• Because it can be measured, its a fact.

2. http://www.vets.ucar.edu/vg/seaice/index.shtml

• Marika Holland, CGD/NCAR, Cecilia Bitz, U. Washington, Bruce Briegleb, CGD/NCAR, Elizabeth Hunke, LANL, Bill Lipscomb, LANL, Richard Moritz, U. Washington, Julie Schramm, CGD/NCAR
• UCAR (University Corporation for Atmospheric Research)
• Very credible from a university specialized for atomospheric research
• it says how the trends of the CO2 levels vary throughout the year.
• Yes
• Because it was shown by a whole bunch of scientist and UCAR is a credit

3. http://www.carbonify.com/carbon-dioxide-levels.htm

• Dr. Pieter Tans, NOAA/ESRL
• Carbonify.com by Michael Bloch
• I don't know how credible this is but it has the same answers as the previous sources, he doesn't really have credentials.
• It shows a graph and talks about why it is zig-zaggy on the graph and thats how it goes up and down yearly
• Yes
  
• Because it shows the same information as the previous sources.

Yes, i believe this fact because all these sources said the same thing and it kind of makes sense.