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Coal seam and shale gases are two commonly found forms of unconventional gas in Australia. Gas is a fossil fuel and is considered cleaner than coal as it produces up to 70% less greenhouse emissions when burned (Gardner, 2015). Coal seam and shale gases are also cheaper than other renewable energy sources, such as wind and solar. Coal seam and shale reserves are widely found across Australia, particularly in Eastern Australia. Fracking, or more commonly known as Hydraulic Fracturing, is the technique used to extract coal seam and shale gases from rock as it improves the flow of gases that are difficult to access (Pearson, 2015). With the ability to use the fracking method to extract coal seam and shale gases, the mining industry considers this a viable and practical mining technique. However, there are debates on the social and environmental impacts of this mining practice.
What is Fracking: Fracking is the process by which heavy machinery drills down into the hard rock layer below the earth’s surface. Fluid is then injected into the ground through a pipeline, while methane gas and chemicals are used to hold open the cracks in the rock layer (Dong, 2014). High pressure water mixture, containing sand and chemicals, is then directed at the rock, releasing the gas inside. It is a procedure that has been available for over 60 years (globally), as an alternative to the traditional unconventional gas extraction methods, but was not considered a cost effective method due to the low prices of gas. To drill a gas well, it uses up to 11-34 million litres of water to complete each job (Williams, 2015). The fracking fluid is made up of sand, water and typically 5-10 chemicals. Some of the main chemicals used are hydrochloric acid- used to dissolve minerals, glutaraldehyde- eliminates bacteria in the water, sodium chloride- stabilises products and magnesium

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