Fracking for Gas

I don't know much about fracking for gas, but it sounds like trying to get the last bit of shampoo out the bottle or scraping the tub for the last bits of butter. It is a controversial process where I think they pump water into rocks to extract gas, but this pressure can create the odd earthquake or two. They had to stop 'fracking' off the coast of Blackpool in North West England after it resulted in two mini earth tremors. So at this point all I can suggest if you don't know much about this subject, like me, is to start at the beginning... the Wiki page.

http://en.wikipedia.org/wiki/Hydraulic_fracturing