Due to natural erosion processes like the weathering and abrasion of rock, soils and sediments by wind and water, a small but significant fraction of natural zinc is continuously being mobilised and transported in the environment.
(a small but significant fraction of natural zinc; is continuously being mobilised; ) (a small but significant fraction of natural zinc; transported; L:in the environment)
a small but significant fraction of natural zinc a small but significant fraction of natural zinc
is continuously being mobilised transported
L:in the environment