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  2. Triboluminescence - Wikipedia

    en.wikipedia.org/wiki/Triboluminescence

    It is the emission of light from the fracture (rather than rubbing) of a crystal, but fracturing often occurs with rubbing. Depending upon the atomic and molecular composition of the crystal, when the crystal fractures, a charge separation can occur, making one side of the fractured crystal positively charged and the other side negatively charged.

  3. Environmental impact of fracking in the United States

    en.wikipedia.org/wiki/Environmental_impact_of_f...

    Hydraulic fracturing uses between 1.2 and 3.5 million US gallons (4,500 and 13,200 m 3) of water per well, with large projects using up to 5 million US gallons (19,000 m 3). Additional water is used when wells are refractured. [28] [29] An average well requires 3 to 8 million US gallons (11,000 to 30,000 m 3) of water over its lifetime.

  4. Fracking in the United States - Wikipedia

    en.wikipedia.org/wiki/Fracking_in_the_United_States

    Environmental Protection Agency illustration of the water cycle of hydraulic fracturing. Fracking in the United States began in 1949. [1] According to the Department of Energy (DOE), by 2013 at least two million oil and gas wells in the US had been hydraulically fractured, and that of new wells being drilled, up to 95% are hydraulically fractured.

  5. Fracking - Wikipedia

    en.wikipedia.org/wiki/Fracking

    Hydraulic fracturing [a] is a well stimulation technique involving the fracturing of formations in bedrock by a pressurized liquid. The process involves the high-pressure injection of "fracking fluid" (primarily water, containing sand or other proppants suspended with the aid of thickening agents) into a wellbore to create cracks in the deep rock formations through which natural gas, petroleum ...

  6. Fracking and radionuclides - Wikipedia

    en.wikipedia.org/wiki/Fracking_and_radionuclides

    Hydraulic fracturing is the propagation of fractures in a rock layer by pressurized fluid. Induced hydraulic fracturing or hydrofracking, commonly known as fracking, is a technique used to release petroleum, natural gas (including shale gas, tight gas and coal seam gas), or other substances for extraction, particularly from unconventional reservoirs. [1]

  7. Want To Know How Fit You Really Are? Here’s The Stat ... - AOL

    www.aol.com/want-know-fit-really-stat-110000210.html

    The Factors That Impact VO2 Max. Your cardio fitness level isn't the only thing that plays a role. There are actually a number of internal and external factors that can have a major impact on your ...

  8. Top 20 apps tracking you every day - AOL

    www.aol.com/news/top-20-apps-tracking-every...

    The apps collecting the most data about you are among the most widely used. Kurt the CyberGuy takes a look at 20 of these apps and how you can protect personal information.

  9. List of additives used for fracking - Wikipedia

    en.wikipedia.org/wiki/List_of_additives_used_for...

    In the US, about 750 compounds have been listed as additives for hydraulic fracturing, also known as ingredients of pressurized fracking fluid, [9] in an industry report to the US Congress in 2011 [10] [11] The following is a partial list of the chemical constituents in additives that are used or may have been used in fracturing operations. [12]