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.
1. Sperm and semen are not the same thing. Spermatazoa, or sperm, is the name given to the reproductive cell that looks like a tadpole. Seminal fluid is the stuff that the tadpole swims in. Together they form semen â an armored tank carrying a fertilization superhero.