Materials, products and services - the Green Guide Online provides details of the life cycle environmental impacts of construction materials and components, and the Green Book is a free online database of products and services.
Spermicides are used globally for birth control, with or without condoms. As the only means of birth control, spermicides are rarely effective. However, in conjunction with condoms, spermicides are somewhat effective in birth control.
Spermicides and vaginal sponges do not work as well at preventing pregnancy as some other forms of birth control. However, using a spermicide or sponge is much better than not using birth control at all. SPERMICIDES. Spermicides are chemicals that stop sperm from moving. They come as gels, foams, creams, or suppositories.