Category Archives: ethanol fuel

Cause and effect

I haven’t been too impressed with ethanol fuels for a while. My concern back then was “that if governments make emotional knee-jerk reactions, the cure may be as bad as the disease it is designed to alleviate.”

In that context, the current food crisis is a salutory reminder of the nature of cause and effect.  Food riots have occurred in Egypt and Haiti and other countries, and the World Bank has warned the increased cost of food will push 100 million impoverished people deeper into poverty.

As this Washington Post article makes clear, the causes of the crisis are many, including the Australian drought, high oil prices and world economic trade barriers which obscured the rising food prices, preventing the market from making gradual adjustments.

However, another cause is the move in the US to plant crops for biofuels. Apparently one-fifth to one-quarter of the US corn crop will go to the production of ethanol for biofuel, which has contributed to the rise in global corn prices. And one must question how efficient biofuel is, according to these statistics stated in a New York Sun article

“It takes around 400 pounds of corn to make 25 gallons of ethanol,” Mr. Senauer, also an applied economics professor at Minnesota, said. “It’s not going to be a very good diet but that’s roughly enough to keep an adult person alive for a year.”

Some environmental and charity groups have now turned against biofuels as a result of the current crisis. It just proves that there’s no easy solution, and that proper and considered thought needs to be put into alternative fuel sources. This is why I hate scaremongering; it leads to irrational responses where the outcomes can be disasterous. Hopefully this will cause some thought about other options instead of biofuel.

But more than that, I hope that people will not starve as a result of the heightened food prices.

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Filed under climate change, Economics, environment, ethanol fuel, food, politics, society, USA

Stop and take a deep breath…if you still can…

I guess my main problem with the nature of the climate change debate is that I want people to think about things before they do them, and complete proper research. Instead of mucking around with the Kyoto Protocol and carbon credits, I think the focus should be on increasing scientific research into alternative fuels. My concern is that if governments make emotional knee-jerk reactions, the cure may be as bad as the disease it is designed to alleviate.

Accordingly, the results of recent research on ethanol fuel are a salutory reminder for everyone to think carefully and take a deep breath before anything too drastic is done. Mark Jacobson, associate professor of civil and environmental engineering at Stanford University published an article in Environmental Science and Technology Online yesterday. The journal’s press release says:

His results…show that ethanol is no silver bullet for health. Switching to E85 blends (85% ethanol, 15% gasoline) could result in slightly higher ozone-related mortality, hospitalization, and asthma (9% higher in Los Angeles and 4% higher in the U.S. as a whole), the study finds. Cancer rates would be similar for gasoline and E85.

“It’s true that ethanol does decrease some pollutants, but it also increases some others,” Jacobson says. Compared with gasoline, ethanol tends to produce less benzene and butadiene, but more acetaldehyde and formaldehyde, when burned.

The result: more ozone and about 185 more deaths per year across the U.S., with 125 of those in Los Angeles. Jacobson studied that city in depth because of its ongoing smog problem and found that it has the right atmospheric chemistry to make the ethanol switch particularly problematic.

Previous studies have estimated the pollution and health effects of burning ethanol, but Jacobson says those researchers simply scaled up tailpipe emissions and plugged those numbers into outdated formulas to calculate ozone changes and cancer rates. His atmospheric model, called GATOR-GCMOM, accounted for the transport of tailpipe emissions across the U.S. along with chemical transformations in the atmosphere—key components that had been neglected in previous studies.

The findings suggest that ethanol cannot be promoted simply as a boon to public health, Jacobson adds. Other factors need to be studied and weighed before ethanol use is made widespread, he says, such as greenhouse-gas emissions, U.S. dependence on foreign oil, and the environmental impacts of growing plants for ethanol.

As an asthmatic, I’m not too keen on the sound of the side-effects of ethanol. Let’s look more closely at fuel cells, say I.

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Filed under climate change, environment, ethanol fuel