I miss estrogen, and I've yet to find a safe substitute.

It was superseded in 1989 when safer and more economic substitutes were found.

Danish law has since 1982 prohibiting the use of hazardous chemicals if safer substitutes are available.

Three of the companies relied on their chemical suppliers for advice about safer substitutes.

But in late 1984 it saw the writing on the wall and stepped up research on safe substitutes.

There are other safer substitutes for a mass movement.

I am looking for a safe substitute for toluene.

Studies by the environmental agency said safer substitutes were available, but they would increase costs for farmers and presumably for consumers.

In addition, certain manufacturers use asbestos as a competitive tool against safe but more expensive substitutes.

Aspen however is widely accepted as a safe substitute.