Fracking is and how it works, and looking at this will also allow us to be able to assess the most pressing environmental concerns and the controversies surrounding fracking.
fracking is the process of drilling down into the earth before a high-pressure water mixture is directed at the rock to release the gas inside. Water, sand and chemicals are injected into the rock at high pressure which allows the gas to flow out to the head of the well. The process can be carried out vertically or, more commonly, by drilling horizontally to the rock layer and can create new pathways to release gas or can be used to extend existing channels. The term fracking refers to how the rock is fractured apart by the high-pressure mixture.[1] In the UK, drilling is only at an exploratory phase, however, there are plans for this to intensify as shale gas reserves have been identified across the UK.
Impacts and Concerns
Having looked at what Fracking is, we will identify it’s impacts on the environment and its most pressing concerns.
The extraction of shale gas is a topic that is highly controversial in the United Kingdom, this is mainly because of the environmental concerns it raises. One of the major concerns is the water usage in the extraction, the volume of water that is needed. Vast amounts of water are required for the process and this must be transported to the fracking sites[2]. The water tends to be transported to the sites, which has its own environmental impacts, though some sites could use the local water resources and the volume of water that is required could place a strain on local water resources. In addition to the amounts of water, the water is mixed with chemicals, this mixture could escape and could spill or contaminate groundwater in the surrounding areas.
Advantages and Disadvantages of Fracking
The main advantages of fracking include, an increase in the production of natural gas, some could argue that this would ease the burden on finite resources such as fossil fuels, fracking would thus diversify our energy supplies. A further advantage is that this is a relatively clean energy source, providing environmental benefit. The gas produced emits less carbon per calorie of energy produced than other fossil fuels. It is easy to inject and it can be transported directly, shale gas requires very little infrastructure investment before it can be injected into the national gas grid, thus proving to be an economical benefit. Fracking is also the most natural way to pump gas from the ground. An abundant supply of natural gas makes prices relatively cheap to producers and consumers.
The disadvantages of fracking include, Risk of groundwater pollution, Risk of localised earthquakes (probably not a huge risk when well-regulated in the UK), Localised noise and traffic congestion, Loss of amenities, when fracking wells are sited in areas of natural beauty and national parks, A high water demand for the “process water” needed by the fracking technology used, potentially entailing additional stress on water supplies, Planning blight on local properties, and suffering by those unfortunate enough to live near a proposed site for a fracking well.
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