The reasons for this increase include: (1) the mass fluoridation of water supplies in some countries, (2) the introduction of fluoride-based pesticides, (3) the use of mechanical deboning processes, and, perhaps, (4) the use of Teflon in certain production processes.ver the past 100 years, the levels of fluoride in foods purchased at the grocery store have increased.
1 The cause of altitude sickness is the decreasing amount of oxygen available as altitude increases. 2  Early symptoms of altitude sickness include. 3  headaches,  fatigue and.
As you pointed out, the basic underlying cause of every major form of altitude sickness (lung and cerebral edema) is hypoxemia (low oxygen levels in your blood) caused by lower atmospheric pressure at higher altitudes.