Frack-off Shell

I read a very lucid description of "fracking" (hydraulic fracturing) and it seems that we should be very concerned about allowing our intellectually blessed and money-grabbing politicians to award concessions to Shell or any other oil and gas company to frack anywhere in our country. Read it on http://www.liveeco.co.za/?m=2&idkey=1723.
I noticed that Zapiro's latest cartoon also exhorts Shell to go and get fracked.