What´s Hydraulic Fracturing?

The word sustainability in my opinion would mean the ability to be held back. I believe this because the root word sustain means to be held behind or retained. After looking up the actual meaning of the word “sustainability”, I found the definition to be much different from mines. The actual meaning of the word sustainability in the dictionary is; the ability to be sustained, supported, upheld, or confirmed, which would relate to the topic of Hydraulic Fracturing.
What is Hydraulic Fracturing you may say? According to Propublica.org, Hydraulic Fracturing is the process used in 9 out of 10 natural gas wells in the United States, Where millions of water, sand and chemicals are pumped underground to break apart the rock and release the gas. The main purpose for Hydraulic Fracturing is due to its inexpensive extraction. Over the past decade, the combination of Hydraulic Fracturing and horizontal drilling has opened up shale deposits across the country and has brought a large quantity of natural gas to new regions. Some places in the nation that practice the use of Hydraulic Fracturing are
• Barnett Shale, FT. Worth Basin, Texas.
• Fayetteville Shale, Arkoma Basin, Arkansas.
• Marcellus Shale, Appalachian Basin.
• Utica Shale, Appalachian Basin.
A significant part of the drilling has occurred
Some human exposure to fracking chemicals can occur by drinking chemicals that have spilled or entered water sources, direct skin contact with the chemicals or waste water, or by breathing in vapors from the contaminated water. Also, during the transportation of these fracturing chemicals it sometimes tends to spill contaminating soil and surface waters. In 2013, 41 spills impacted surface waters in Colorado alone. (Source worksaction.org) The chart below shows the possible health effects that can result from the chemicals in the Fracturing