1.   He also found that the effects of exposure to one environmental estrogen can be compounded by being exposed to a different one.

2.   In October the Journal ran an editorial saying that environmental estrogens like PCBs and DDT are not causing breast cancer.

3.   The relevance of this finding of a synergistic effect between environmental estrogens to what actually occurs in the environment remains to be determined.

4.   The cause of the fall is still disputed but researchers say environmental estrogens are a prime suspect.