TS. PGC A 4 Environmental aspects of unconventional gas P. Charlez TS PGCA4 Final Contributions.pdf P.Charlez TS. PGC A 4 Final Presentation .pdf T.Thorn TS. PGC A 4 Final Presentation .pdf J. Stangline TS PGCA4 Final Contributions.pdf J. Stangline TS. PGC A 4 Final Presentation .pdf M.Stark TS. PGC A 4 Final Presentation .pdf