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  2. Water intoxication - Wikipedia

    en.wikipedia.org/wiki/Water_intoxication

    Water intoxication, also known as water poisoning, hyperhydration, overhydration, or water toxemia, is a potentially fatal disturbance in brain functions that can result when the normal balance of electrolytes in the body is pushed outside safe limits by excessive water intake.

  3. Opposition to water fluoridation - Wikipedia

    en.wikipedia.org/wiki/Opposition_to_water...

    Those who emphasize the public good emphasize the medical consensus that appropriate levels of water fluoridation are safe and effective to prevent cavities and see it as a public health intervention, replicating the benefits of naturally fluoridated water, which can free people from the misery and expense of tooth decay and toothache, with the ...

  4. Water memory - Wikipedia

    en.wikipedia.org/wiki/Water_memory

    Water memory is the purported ability of water to retain a memory of substances previously dissolved in it even after an arbitrary number of serial dilutions.It has been claimed to be a mechanism by which homeopathic remedies work, even when they are diluted to the point that no molecule of the original substance remains, but there is no theory for it.

  5. Brain health and pollution - Wikipedia

    en.wikipedia.org/wiki/Brain_health_and_pollution

    These nanoparticles may be able to reach the brain via the olfactory nerves and olfactory bulb, or via the circumventricular organs where the blood-brain barrier is more permeable. In addition, the blood-brain barrier could be made less impermeable by systemic inflammation for which exposure to air pollutants is a known risk factor.

  6. Water fluoridation - Wikipedia

    en.wikipedia.org/wiki/Water_fluoridation

    Fluoride can occur naturally in water in concentrations well above recommended levels, which can have several long-term adverse effects, including severe dental fluorosis, skeletal fluorosis, and weakened bones; water utilities in the developed world reduce fluoride levels to regulated maximum levels in regions where natural levels are high ...

  7. Water purification - Wikipedia

    en.wikipedia.org/wiki/Water_purification

    Groundwater: The water emerging from some deep ground water may have fallen as rain many tens, hundreds, or thousands of years ago. Soil and rock layers naturally filter the ground water to a high degree of clarity and often, it does not require additional treatment besides adding chlorine or chloramines as secondary disinfectants.

  8. Water security - Wikipedia

    en.wikipedia.org/wiki/Water_security

    Increasing water pollution and low levels of wastewater treatment, which is making local water unusable. Poor planning of water use, poor water management and misuse. These can cause groundwater levels to drop, rivers and lakes to dry out, and local ecosystems to collapse. Trans-boundary waters and international rivers which belong to several ...

  9. Heavy water - Wikipedia

    en.wikipedia.org/wiki/Heavy_water

    Heavy water is 10.6% denser than ordinary water, and heavy water's physically different properties can be seen without equipment if a frozen sample is dropped into normal water, as it will sink. If the water is ice-cold the higher melting temperature of heavy ice can also be observed: it melts at 3.7 °C, and thus does not melt in ice-cold ...