= Toxicity or other hazards do not imply an environmental hazard, because elimination by sunlight ( photolysis ), water ( hydrolysis ) or organisms (biological elimination) neutralizes many reactive or poisonous substances. Persistence towards these elimination mechanisms combined with toxicity gives the substance the ability to do damage in the long term. Also, the lack of immediate human toxicity does not mean the substance is environmentally nonhazardous. For example, tanker truck-sized spills of substances such as milk can cause a lot of damage in the local aquatic ecosystems: the added biological oxygen demand causes rapid eutrophication , leading to anoxic conditions in the water body.
Major commodity crops raised from GMO seed include: corn (92%*), soybeans (94%*), and cotton (94%*). Almost 98% of Canadian grown canola is genetically engineered for herbicide resistance. sugar beet production is estimated to be over 95% genetically modified for herbicide resistance. GMO sweet corn, papaya, zucchini, and yellow summer squash are also for sale in grocery stores, but in lesser amounts. Genetically modified alfalfa is grown for use as hay and forage for animals. For more information about avoiding GMOs in food, go to .
Although fluoride advocates have claimed for years that the safety of fluoride in dentistry is exhaustively documented and “beyond debate,” the Chairman of the National Research Council’s (NRC) comprehensive fluoride review, Dr. John Doull, recently stated that: “when we looked at the studies that have been done, we found that many of these questions are unsettled and we have much less information than we should, considering how long this [fluoridation] has been going on. I think that’s why fluoridation is still being challenged so many years after it began.”