Have you seen Bill McKIbben's article "Global Warming's Terrifying New Chemistry" in *The Nation*? http://www.thenation.com/article/global-warming-terrifying-new-chemistry/
The layperson's take-away: We all, including EPA, have been badly under-reporting methane emission. New data suggests that rather than reducing greenhouse gas effects in recent years, they may have actually increased.
Conclusion: every bit of fosil fuels - including coal, oil, and now most notably natural gas - must stay in the ground.
Conclusion: referring to gas as a "bridge fuel" is absurd at best, subversive at worst.
I would love to see how we can reboot some of our energy work in West Virginia to reflect this "terrifying new chemistry."