RT Report
T1 Air Concentration and Deposition Rates from Uniform Area sources: A Technical Report
A1 United Nations Environment Programme, 
A1 Monitoring and Assessment Research Centre, 
K1 air
K1 lead
K1 radon
K1 land
K1 water
PB The Monitoring and Assessment Research Center
YR 1987
FD 1987
LK https://wedocs.unep.org/handle/20.500.11822/22509
UL https://wedocs.unep.org/handle/20.500.11822/22509
NO The surface of the earth or the sea may release certain substances to the atmosphere. Often these substances are also classed as pollutants when produced by human activities. This report provides a theory and illustrative charts to predict the natural contribution to the air concentration or deposition. To apply the theory, the natural source strength must be known and, unfortunately, this is often unavailable. The theory has been approximately validated by several natural substances such as radon gas and lead.
DS UN Environment Document Repository
RD Sep 18, 2026