the ultrastructure characteristics of leaves during the development of cell organelles , in the `` '' greening process '' '' of spring , have been studied in pollutant-tolerant and susceptible individuals of beech ( fagus silvatica ) and hornbeam ( carpinus betulus ) in an area polluted with so2 ( the main pollutant may reach 0.06-2.72 mg/m3 ) , heavy metals , and other gases discharged by non-iron metal processing factories .
C0347988
, heavy meta
C0302583
n-ir