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.
Smoking Marijuana Lowers Fertility. Sperm Burn Out, Less Potent When Men -- or Women -- Smoke Marijuana. From the WebMD Archives. Oct. 13, 2003 -- Smoking marijuana makes sperm less fertile -- even if the woman is the one who smokes it, a new study shows.