HYDRAULIC fracturing, or fracking, is a drilling method used to extract petroleum (oil) or natural gas from deep in the earth. In the fracking process, cracks in and below the earth surface are opened and widened by injecting water, chemicals, and sand at high pressure. Hope this helps you.
The only disadvantage I could think of would be price of equipment needed to produce energy from the source (i.e. price of solar panels)
<span>The birthrate and the death rate were about equal.</span>
