Sunday, June 2, 2013

A Promising Transition or The Death of Renewables

Last month's Atlantic featured a thoughtful analysis of natural gas and it's affect on the economy. The article discusses the unfortunate past, transitional present, and dubious future of energy:

Past:
Fuel: Coal --> Oil
Politics: In 1913, Winston Churchill pushed to convert Great Britain from coal to oil, a campaign which embedded the West within the heart of the Middle East. Dependence on foreign oil was born. In an effort to stabilize oil supply, Western leaders meddled in regional affairs, supporting welcoming leaders and ousting the rest. While our oil supply was being controlled, the economic and civic strength of these countries was compromised, causing destabilization that produced millions of disaffected middle easterners, some of whom have since lashed back at America.

Present:
Fuel: Oil --> Natural Gas
Politics: Natural gas is clearly a political win. Because America has a lot of it, the concern over foreign oil dependence may soon end. Not only that, but natural gas could play a role in economic recovery. The peak oil debate is no longer relevant. Improving technologies will likely lead to a nearly endless supply of fossil fuels, regardless of source or form. Reversely, cheap, bountiful natural gas makes renewable energy a lot less competitive.

Future:
Fuel: Natural Gas, Renewables, or Both
Politics: The question is, will natural gas become our main energy source or will it act as the gateway to a more sustainable future? Carbon emissions need to be all but eliminated in order to combat climate change, and settling on natural gas could be our undoing.


Some Background: Natural Gas and Fracking
Livestock are responsible for approximately 30% of US methane emissions.
Currently, natural gas is obtained through a process called fracking (hydraulic fracturing), which uses a horizontal drill and a high pressure slurry (water, chemicals, sand, etc) to extract methane from shale rock. I don't protest natural gas, nor do I advocate it. My only hope is that we don't suffer from the Trojan horse effect.

Pros:
1. It has the potential of eliminating our dependence on foreign oil. As stability in the Middle East becomes increasingly tenuous, this is essential.
2. Natural gas burns cleaner than oil and coal. CO2 emissions in the US have decreased 12% over the last 7 years, due in part to the natural gas boom.
3. Natural gas has an EROEI (energy return on energy invested) of 87, as compared to 4-7 for tar sands, and 12-18 for OPEC oil. Though these exact numbers may be debated, natural gas is typically the leader.
4. Natural gas is bountiful and cheap, which may aid US economic recovery.

Cons:
1. Despite some claims that methane leaks from fracking are minimal, actual field tests have not been completed. Some large, undiscovered leaks could lead to significant releases of methane, a far worse greenhouse gas than CO2.
2. The high pressure extraction liquids used in fracking could contaminate surrounding areas. While rules on concrete well casings have been established, the BLM (National Bureau of Land Management) is not requiring companies to post a complete list of chemicals if they are considered trade secrets. Furthermore, all chemical reporting does not  need to be completed until AFTER wells have been tapped.
3. There is not yet enough historical data to prove that methane won't leak through the fissures up into the soil, for which there are no protections in place.