meats and cereals contributed most to total intakes. In addition,
the investigation carried out in 2000 showed that HCHs and
DDTs in grain were 5.3 and 25.2 ng/g, respectively (Wang et al., 2002),
which were much less than similar results observed in 1970–1978
(HCHs, 146 ng/g; DDTs, 24.4 ng/g) (Zhao et al., 2003). Although there
were still OCPs detected, residues of OCPs in grain and soils generally