
During his State of the Union address last night, President Obama made a huge point of promoting natural gas, while also trying to appear concerned about any potential impacts from drilling. Here’s what he said:
We have a supply of natural gas that can last America nearly 100 years. And my administration will take every possible action to safely develop this energy. Experts believe this will support more than 600,000 jobs by the end of the decade. And I’m requiring all companies that drill for gas on public lands to disclose the chemicals they use. Because America will develop this resource without putting the health and safety of our citizens at risk.
The development of natural gas will create jobs and power trucks and factories that are cleaner and cheaper, proving that we don’t have to choose between our environment and our economy. And by the way, it was public research dollars, over the course of 30 years, that helped develop the technologies to extract all this natural gas out of shale rock –- reminding us that government support is critical in helping businesses get new energy ideas off the ground.
The president didn’t mention the recent downsizing of government estimates of the Marcellus Shale gas play, which we covered the other day here. But perhaps more importantly, President Obama didn’t mention at all the very vigorous scientific debate over whether natural gas really improved greenhouse gas emissions compared to coal. We’ve covered that issue before here, here, here and here. And it’s worth noting that there’s been another paper published criticizing Cornell scientist Robert Howarth’s work on this issue and a reply by Howarth that vigorously defends his original conclusion:
We believe the preponderance of evidence indicates shale gas has a larger GHG footprint than conventional gas, considered over any time scale. The GHG footprint of shale gas also exceeds that of oil or coal when considered at decadal time scales, no matter how the gas is used. Considered over the century scale, and when used to generate electricity, many studies conclude that shale gas has a smaller GHG footprint than coal, although some of these studies biased their result by using a low estimate for GWP and/or low estimates for methane emission. However, the GHG footprint of shale gas is similar to that of oil or coal at the century time scale, when used for other than electricity generation. We stand by the conclusion: “The large GHG footprint of shale gas undercuts the logic of its use as a bridging fuel over coming decades, if the goal is to reduce global warming.”








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