Cyanobacteria is the most common type of microalgae used for biofuel (“Massachusetts company making,” 2011) The biofuel from algae can be cost effective, only costing ten to twenty dollars a barrel to produce....
CDIAC is supported by DOE's Climate and Environmental Sciences Division within the Office of Biological and Environmental Research (BER).
Carbon dating is somewhat accurate because we are able to determine what the ratio was in the unobservable past to a certain extent.
By taking a carboniferous specimen of known age (that is, a specimen which we are able to date with reasonable certainty through some archaeological means), scientists are able to determine what the ratio was during a specimen's lifetime.
However, rocks and other objects in nature do not give off such obvious clues about how long they have been around.
So, we rely on radiometric dating to calculate their ages.