The Stuff Leaks...

...and so the notion of Carbon Sequestration takes another hit:

"The fact that methane gas can escape from a thick shale seafloor may demonstrate that there needs to be more research done on the integrity of geologic seals in petroleum reservoirs earmarked for CO2 injection,” says [Federico] Krause who is a professor in the Department of Geoscience at the University of Calgary. “It shows that under different geologic circumstances gases that are present in underground formations can indeed seep out, and all the effort expended in trying to remove CO2 from our atmosphere would be lost.”