Fracking is a form of natural gas drilling. But as gas drilling takes place, using a process called hydraulic fracturing or "fracking," toxic chemicals and methane gas seep into drinking water. Fracking chemicals are linked to bone, liver and breast cancers, gastrointestinal, circulatory, respiratory, developmental as well as brain and nervous system disorders. Such chemicals are present in frack waste and may find their way into drinking water and air. And now experts fear even worse, unacceptable levels of radioactive Radium 226 in gas development waste.