Monthly Archives: February 2013

the rebound effect and how energy efficiency may not be the “low hanging fruit”

An interesting paradox: as we conserve more energy, we use more. We pointed out some research in the past on this effect, and some debate about the potential impact of this effect has surfaced in a couple places.  First, there … Continue reading

Posted in energy, science, sociology | Tagged , , | 1 Comment

The blend wall and what we will do with all the cellulosic ethanol

While we’ve discussed production issues with cellulosic a bit on this site (here and here), if John is right and we do scale up in the next couple years, whatever are we going to do with it all? They … Continue reading

Posted in biofuels, policy | Tagged , , , | 2 Comments

Has biofuels led to major land use changes in the US?

And is the land that is being converted from grassland to corn and soy the “marginal land” that people take about growing dedicated bioenergy crops?  A new article in PNAS this week seems to answer “yes” to both these questions. … Continue reading

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Energy access as a life-or-death issue

We’ve devoted a fair amount of space on this blog to issues of energy access in developing countries, including examining whether Clean Development Mechanism projects are being preferentially established in the countries with the lowest energy access (apparently not), and … Continue reading

Posted in energy, sustainable development | 4 Comments

updates on the court challenge to the RFS: minimal long-term impact

I like how this post by Judy Endres explains the recent court ruling “overturning part of the RFS”.  The devil is in the details: Although the court rejected EPA’s approach favoring overestimation of projected cellulosic biofuel production, the RFS itself, … Continue reading

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The RFS- basket case, or just a few years ahead of it’s time?

When Congress established the Renewable Fuel Standard (RFS) through the 2007 Energy Independence and Security Act, one of the primary goals was to grow the fledgling cellulosic ethanol sector from laboratory scale up to an industry surpassing corn ethanol, via … Continue reading

Posted in biofuels, energy, policy | Tagged , | 8 Comments

comparing original RFS volumes with revised volumes (some perspective)

Today the EPA released revised mandated amounts of biofuel to be blended under the RFS legislation. To put these numbers in perspective I have taken the original requirements for cellulosic in the 2007 law and compared to the revised amounts … Continue reading

Posted in biofuels, policy | Tagged , , , | 7 Comments