Thus the standards for domestic rice cite only cadmium and mercury. And it is hard to yet a definite conclusion as to whether affected soil, tike that of the water convolvulus on the banks of the Er-jen River, should be listed as officially polluted.
也因此國內食米標準只定了鎘與汞，土壤汙染的標準也不易定；而汙染農地，譬如二仁溪旁空心菜園，要不要列為汙染區就難有定論。