Abstract
The air pollution caused by CO2 from fossil fuel origin was quantitatively studied by radiocarbon (14C) measurement on the samples of new leaves taken from roadside trees. In the area where concentration of CO2 (12CO2+13CO2) of fossil fuel origin was high, the count of β-ray radiation from 14C tended to be low. The relation between the concentration of sulfur dioxide (SO2) in the air and the count of β-ray radiation from the leaf samples could be represented by a linear regression, Y= (17.568/X) -67.385; r = -0.995Where Y is the SO2 concentration in ppb and X is the β-ray radiation count (Bq/g-carbon) .
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