[Dr. Scott W. Tinker] We looked at the benefits of fracking and some of the water issues, now let's look at the risks of methane leaks. Several studies in fracking areas have shown that methane- natural gas- is found in people's water wells. We know that methane is naturally occurring in water, so in and of itself that's not alarming. The chemical signatures of the gas revealed that some came from decaying plant matter, but some came from deeper rock formations. One study found the methane was related to fracked wells. It's rare, but as with all oil and gas wells, on occasion, the concrete surrounding the surface casing can have small cracks which would allow the methane to leak into the groundwater. While the other studies found that the methane came from gas bearing formations not related to fracking, there have been other studies that look at methane release to the atmosphere. Again one study found that frac wells released two to three times the quantity of conventional wells, while others refuted it. This has been the pattern with methane leak studies. One or two find that frac will leak more, more studies find that the same as conventional wells. But the same isn't good enough. Methane is a greenhouse gas, considerably more potent than CO2. If increased supply means we'll use considerably more natural gas, the new wells and new pipeline infrastructure need to leak less than in the past. No one wants the benefits of reducing CO2 to be offset by leaking methane. And that's the heart of the issue with fracking. There are definitely risks, but no energy is perfect. These are trade-offs for the very significant emissions and economic benefits of natural gas. We need to suspend our biases and understand the facts and then make and enforce regulations intended to minimize the risks and maximize the benefits.