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.
TodayÂ® Sponge is the most effective over-the-counter vaginal contraceptive, more effective than spermicides alone. Nonoxynol-9 is a spermicide used by millions of couples for over 40 years. Nonoxynol-9 prevents pregnancy by killing sperm on contact.