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--Schnetzer, Amanda Watson. "Salt: A World History: although common and inexpensive today, salt has been `one of the most sought-after commodities in human history.' (Books: the world in a grain of salt)." Insight on the News 11 Mar. 2002: 29. General OneFile. Web. 22 Sept. 2015.

--"Time trip." Current Events, a Weekly Reader publication 26 Apr. 2002: 2+. Global Issues in Context. Web. 22 Sept. 2015.

--Mufson, Steven .. "Study: Bad Fracking Techniques Let Methane Flow into Drinking Water." Washington Post. The Washington Post, 15 Sept. 2015. Web. 22 Sept. 2015.

--Minkel, JR .. "Self-Healing Rubber Keeps on Stretching, Rip after Rip."Scientific American Global RSS. Scientific American, 21 Feb. 2008. Web. 22 Sept. 2015.

--Sample, Ian .. "Ancient Rome's Tap Water Heavily Contaminated with Lead, Researchers Say." The Guardian. The Guardian, 21 Apr. 2014. Web. 22 Sept. 2015.

--Zoske, Mark .. "History Of Salt." History of Salt. Salt Works, 1 Jan. 2015. Web. 22 Sept. 2015.

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The ancient Mayans relied on chocolate to have a business and economic opportunity. such as today we rely on it for power and for economical opportunity as well

http://go.galegroup.com/ps/i.do?id=GALE%7CA85103769&v=2.1&u=tlc119114582&it=r&p=GPS&sw=w&asid=3b1ee3be04248e2081daf1409ec952ea

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Natural gas is similar to salt back in ancient times. we need natural gas now to generate gas for power and for money just like in ancient times the ancient people such as the Greece would valuable salt very highly and would use it to preserve meats and sell it to maintain great profits. salt back in ancient times was a translation for salary as it was so expensive and a delicacy such as natural gas and fossil fuels are highly valued today.

-http://www.saltworks.us/salt_info/si_HistoryOfSalt.asp

-http://go.galegroup.com/ps/i.do?id=GALE%7CA83699656&v=2.1&u=j061911001&it=r&p=GPS&sw=w&asid=7be6280bca393ffaff06e9d8956cea38

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The rubber that would surround the pipe is a new type of self healing rubber. This rubber can be torn apart and then pressed back together and then it is ready to rip and stretch again. This rubber can also be stretched to extreme measures and still return to its original length and state.

http://www.scientificamerican.com/article/self-healing-rubber-keeps-stretching-after-rip/

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Amazing Self-Healing Rubber! Part 1 of 2.

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Space-age technology Self-healing rubber. Part 1 of 2. A remarkable material that heals once broken is presented in Nature. The material displays rubber-like behaviour, but, unlike a rubber band, once snapped, all is not lost. To create it, Ludwik Leibler and colleagues use different groups of molecules that link together via hydrogen bonds.

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In the D/FW area the pipes that are used by fracking companies to extract methane gas leak. Even though the pipes are surrounded by concrete it is too brittle and does not have the ability to Seal the pipe to prevent the leaks. The methane leaks are contaminating the drinking water around these fracking sites.

http://www.washingtonpost.com/news/wonkblog/wp/2014/09/15/study-bad-fracking-techniques-let-methane-flow-into-drinking-water/

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The solution to this issue would be to enclose the pipe in a rubber material that pipe would then be surrounded in a bigger pipe that would also be surrounded with a rather thick layer of rubber. To prevent a leak from occurring which would keep the methane out of the drinking water, reducing health problems that come from consumin methane.

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It is partially because of fracking that Methane gas leaks into the drinking water. When the gas is extracted the pipes that bring it to the surface have an outer lining of cement, which seals the pipe in to prevent leaks. But the cement doesn't always keep the gas in, which is why leaks occur, not from the tank that they are held in as people have come to believe.

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http://info.acoustiblok.com/Portals/35535/images/fracking%20how%20it%20works%202%20D%20drawing.jpg

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In ancient Rome the aqueducts contaminated the tap water with high amounts of lead. It wasn't enough lead to kill the entire empire but It killed and got a lot of people sick.

http://www.theguardian.com/science/2014/apr/21/ancient-rome-tap-water-contaminated-lead-researchers