Sunday, April 26, 2015

Chinese energy figures suggest much slower growth than advertised

Last year China reported the slowest economic growth in 24 years, about 7.4 percent. But the true figure may actually be much lower, and the evidence is buried in electricity figures which show just 3.8 percent growth in electricity consumption.

David Fridley, a staff scientist in the China Energy Group at the Lawrence Berkeley National Laboratory, has been a longtime collaborator with the Chinese on energy management, efficiency and policy. Fridley, who has held Chinese energy-related jobs for 35 years, believes that electricity consumption in China is a better indicator of its economic growth.

Historically, electricity consumption and economic growth in China have been very closely linked. "From 2005 to 2013, the average elasticity of electricity demand was 1.09, meaning electricity demand was up about 1.09 percent for every percent rise in GDP," Fridley wrote in an email. "In 2014, that number fell to 0.51, the lowest in this 10-year period. During the economic crisis of 2008, it did fall below the average, to 0.60, but quickly rebounded to above 1."

Sunday, April 19, 2015

Sunday, April 12, 2015

How the climate change debate got hijacked by the wrong standard of proof

Everyone loves a courtroom drama--especially one that pits a feisty, but a determined criminal defense attorney against the awesome power of a prosecutor who has the resources of the state behind him or her. We see such David and Goliath stories every week on television.

We cheer as the defense attorney pokes one hole after another in the case of the prosecutor, raising what the audience now perceives as reasonable doubt. But will the jury see it that way? We'll return after these messages....

This is just the sort of metaphorical setting into which the climate change denial lobby is trying to place the debate over climate change without the public or even most policymakers realizing it. The deniers in the fossil fuel industry and elsewhere are attempting by sleight-of-hand to get both the public and policymakers to abandon the preponderance of evidence standard used primarily in civil trials--and which is similar to evidence-based public policymaking--in favor of another judicial standard designed for criminal trials, namely, beyond a reasonable doubt.

Sunday, April 05, 2015

The hidden reasons behind slow economic growth: Declining EROI, constrained net energy

It should seem obvious that it takes energy to get energy. And, when it takes more energy to get the energy we want, this usually spells higher prices since the energy inputs used cost more. Under such circumstances there is less energy left over for the rest of society to use, that is, for the non-energy gathering parts--the industrial, commercial and residential consumers of energy--than would otherwise be the case.

It shouldn't be surprising then that as fossil fuels, which provide more than 80 percent of the power modern society uses, become more energy intensive to extract and refine, there is a growing drag on economic activity as more and more of the economy's resources are devoted simply to getting the energy we want.

A more formal way of talking about this is Energy Return on Investment or EROI. The "energy return" is the energy we get for a particular "investment" of a unit of energy. The higher the EROI of an energy source, the cheaper it will be in both energy and financial terms--and the more energy that will be left over for the rest of society to use.