Cultivation of sugar cane in Brazil seems to be widespread handwork. I read about the 'catastrophic conditions' in which even children are working there - in contrary to US corn agriculture that seems to highly work with machinery.

So how can one compare the energy input correctly?

I read about the 'catastrophic conditions' in which even children are working there...

Child labor was a part of their sustainability criteria. While they flagged it as a concern, it didn't appear to be widespread, and they felt like it could be addressed. On the other hand, even if they don't address it, someone else is still going to buy that ethanol. That is going to be a problem unless everyone adopts the Dutch sustainability criteria.

The child labour issue is mentioned in passing here:http://assets.panda.org/downloads/sustainablesugar.pdf

But this is a paper, prepared for the World Wildlife Fund, which should be read for other reasons as well.  First of all it shows that sugar cane cultivation can (but doesn't necessarily have to) impact negatively in ecologically varying areas.  In fact rain forest areas seem only marginally under threat from sugar cane. (We should perhaps spend a little more time considering the impact of mining other low entropy resources, such as old growth woods from North American rain forests.)

One key point made in this paper relates to the impact of subsidized European and U.S. sugar production (mostly from beets) on sugar cane cultivation practices in poor countries.

Of particular value in the paper is the contention that Best Management Practices can mitigate, if not entirely overcome, negative environmental and social impacts of sugar cane cultivation.

This is of course what Milton Maciel has been telling us for years.  

Now, I don't know if Robert was referring to posts I have on occasion made when he wrote:

"One area that did not fare as well as sugarcane ethanol advocates have often advertised is on the issue of soil erosion. I have been told a number of times that there is no erosion from sugarcane production, or that production is managed such that the topsoil actually increases over time."

Milton Maciel has made numerous posts on Yahoo Groups - Energy Resources that organic sugarcane cultivation, and we of course assume best mangagement practices, does improve the topsoil over time.  Is he wrong?

I guess once a European or North American agency verifies the evidence then we will have "precisely the kind of study that has been needed to verify that claims ... are on sound scientific footing".  After all, what the hell is Brazilean research worth anyway?

 

The WWF paper does not cover Brazilian->EtOH production and with respect to Brazil proper, the paper does not mention child labor but rather gives out an arbitrary reference about North East living standards.

NOTE: Brazil isn't even listed as one of the countries that the WWF is working in.

This paper does indeed highlight best management practices such as using vinasse for fertilization, bagesse for cogen heat and surplus electrical generation - practices all utilized in Brazil.

A key point -yet again- is the effect that decimating 1st world protectionist trade policy is having on 3rd world agro economies.

8 workers/hectare is not 'handwork' It is industrial human labor and is not calculated in these rosy eroei calculations. A hard day is 3000 calories. The food, transport, room and board, and medical costs for these labors are 10X that amount.

No one calculate 30,000*8 laborers/hectare in the energy formulas

Sugar cane is not energy positive and studies that suggest it are not robuts.

This is one of the areas of net energy analysis that needs to be expanded upon. We live in an interconnected world where it is increasingly difficult to parse everything into one common denominator. Society has attempted to do this using a global monetary system, but its proving difficult to put proper dollar values on air, water, ecosystem services, etc. Would you rather a new $50,000 mercedes or clean air to breathe for the next 10 minutes?

Net energy analysis in my opinion, will be critical in the coming transition from fossil fuels to renewables (irrespective if there ends up being 10 billion people or 1 billion). But to parse everything into energy terms is not paying attention to systems analysis. We need to consider the impact on land, on labor, on soil, etc as well as energy. We still dont have a mechanism to synthesize and compare all these things. EROI is one measure. Dollars are another. We need something better.

Nate,

Look at the scientific work of H.T. Odum on emergy. Emergy provides a accounting system for the work of nature and humans.

I should have written 'we still dont have a system other than Odums eMergy' for assimilating all inputs other than energy
In fact, the criticism of the paper with the lower EROEI, in addition to having the diesel input wrong, was that it represented emergy, and not energy.
"8 workers/hectare is not 'handwork' It is industrial human labor and is not calculated in these rosy eroei calculations. A hard day is 3000 calories. The food, transport, room and board, and medical costs for these labors are 10X that amount."

Sure.  And to get a fair comparison let's calculate the energy burned by the advertising agency staff for the heavy machinery for the oil and gas service industry trade show.  And for that matter, their babysitters, so that the ad agents can work overtime.  Yeah, and the energy burned by the mother's of the pimply faced servers at the fast food joints, who send up sandwiches to the security staff so that the ad agents babysitters can babysit without risk of kidnappers.

this is unreasonable because all these post production costs are exactly the same for ethanol and petroleum

no, the cost of those 8 field laborers is repeated year after year in the field while the crude essentially flows under its own power into the refinery. 240,000 calories are burned for the production of that hectare. I wonder what percent of the final fuel that represents?

240,000 calories are burned for the production of that hectare. I wonder what percent of the final fuel that represents?

Less than 1%.

240,000 calories = 8 gallons of gasoline (source).  Brazil is getting about 7,000 litres of ethanol per hectare (source), meaning that 240,000 calories is only about 0.8% of the energy content of the fuel.

i.e., totally, completely, and rather obviously inconsequential.  Think about it logically -- if the energy for food was more than the amount of energy in the fuel, how could this be economically viable, which it clearly is?  Drop your preconceptions and think about it for a moment.

Drop your preconceptions and think about it for a moment.

If pstarr dropped his/her preconceptions what would he/she have left?

There are some real serious concerns about biofuels, primarily the environmental impacts of biodiesel on rainforests in South America and SE Asia. It is esential to address these and to recognize that they will and should limit the use of biofuels.

However those sticking their fingers in their ears and chanting EROEI, EROEI, EROEI aren't helping much.

240,000 calories = 8 gallons of gasoline (source).  Brazil is getting about 7,000 litres of ethanol per hectare (source), meaning that 240,000 calories is only about 0.8% of the energy content of the fuel.

i thought 8 gallons for the workers is per day while 7000 liters is per year?

If the workers were consuming 240,000 calories per day they would explode.
Apparently that's not relevant. What can I tell you? I never believe any numbers that don't match mine. But I've got none in this case and you've got nobody to contradict you. So I've got to go with my original statement. Apparently nobody gives a shit that people will blow up. Maybe I phrased that wrong. Maybe I should've have said the proletariat. Careful. There are hardcore communists in our midst. I'll draw the fire. But you may have to carry it.
Brazilian sugarcane production is shown to be energy positive study after study after study and yet some of us just don't seem to get it do they pstarr?
Many Brazilian farms are mechanized with specialized vehicles for harvest and transport and due to the overall success of the industry, real wages and living standards for those involved have increasd.

Please provide the link or source for the so-called catastrophic conditions and child labor in the Brazilian sugarcane industry.

don't know whether you accept a german wikipedia page as reliable:

http://de.wikipedia.org/wiki/Zuckerrohr#Geschichte

The last paragraph says:

"Today sugar cane is grown worldwide and produces 55 per cent of all sugar. Main production nations are India, Australia, Thailand, South Africa, the Caribbean and of course Brazil.
Working conditions on the fields are partially catastrophic. Often children and women are employed as laborers, poor payment is widespread in sugar cane cultivation anyway.
Brazilian plantage laborers earn some 2 Reais (appr. 70 Euro-Cents, as of aug 2006) for a ton of chopped cane.

Daily performance of good workers is 8 to 10 tons. That's why cane sugar can be sold so inexpensive, however it is not  competitive in the EU against beet sugar due to heavy duties."

This aspect is not mentioned on the english wikipedia site about sugar cane. The harvester is described there.

I may apologize when some expressions appear to be rude (maybe "performance" while speaking of human labor isn't nice) - I don't mean to insult anyone. This was a quick translation of the german text, and I am no native speaker.

Thanks for the follow-up.  

I fully agree that places such as India/Africa have big child labor issues albeit this problem is in every sector of their respective economies not just sugarcane production.

Moreover, working conditions for menial farm labor in any 3rd world country are not exactly going to be terrific by any western standard, however, wages and conditions would likely improve if the world market prices for crops produced weren't so artifically low.

And as posted below re: WWF article as it relates to our subject... Brazil is not a country the WWF is too concerned about.

I should add that I had read a story recently which outlined how Brazilian cane cutter's lives were improving because of the ethanol fuel industry.  I will try to find it and post the link for you.

Sugar cane in Thailand is grown almost exclusively on small farms owned by the farmers. They are protected by a governmnet scheme that requires sharing of profits between farmers and refiners.

This is one reason why cane prices here are higher than Brazil.