Areas of Expertise:

Biofuels, Carbon Capture and Sequestration, Clean Energy, Climate Change, Coal, Electric Vehicles, Energy Efficiency, Energy Storage, Geothermal, GHGs, Hydraulic Fracturing, Hydropower, Liquid Fuels, Natural Gas, Nuclear, Oil, Regulation, Renewables, Smart Grid, Solar, Transportation, Wind

Additional Areas of Expertise:

Power Electronics, Robotics, Embedded Software, Real Time Operating Systems, Fluid Dynamics, Heat Transfer

After 30 years as a software engineer, systems architect, and technology consultant, Mr. Arnold now directs the Silverthorn Institute. The institute serves as a clearing house for ideas and tools for sustainability and local sufficiency in energy and resources.

Recent Comments by Roger Arnold

• "I mostly agree. One of the reasons I'm in favor of CO2-based EOR is that in addition to sequestering carbon, it allows a slowly. tapering demand for o"
  The Future of the Natural Gas Industry
• "Are you a judoka, Dan? I was expecting pushback from you, and I now find myself off balance. Whether or not your reply was intended for that effect, y"
  The Future of the Natural Gas Industry
• "I'm sorry, Dan. I know this won't sit well with you, but I cannot regard Robert Howarth as a methane expert. I've read the paper that he and Mark Z. J"
  The Future of the Natural Gas Industry
• "I don't entirely agree. Over the long run, use of fossil fuels is not sustainable. No question about that. And while mountain top removal for coal min"
  The Future of the Natural Gas Industry
• "I don't think that there's a strong consensus, as yet, that the leakage rates for natural gas are as high as the studies you refer to suggest. There's"
  The Future of the Natural Gas Industry
• "The order of magnitude difference I was speaking of is in the energy cost, not the monetary cost. Sorry, I should have made that clearer. In "
  The Future of the Natural Gas Industry
• "Well, this is embarrassing. I stand by most of what I wrote above, but I blew it on one rather important point. That's regarding the abundance of natu"
  The Future of the Natural Gas Industry
• "Facilitate the use of captured CO2 for EOR."
  The Future of the Natural Gas Industry
• "I don't see natural gas as having any truly long-term role. It has an important short-term role, but I don't expect it to last for long. Ten years may"
  The Future of the Natural Gas Industry
• "The route to renewable hydrogen leads through hydrogen made by reforming of fossil fuels -- with CCS. Once it's produced, the. provenance of hydrogen "
  The Role of Hydrogen