Stop Biofuel Lunacy: Effects on Global Food Crisis

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Biofuel production is exacerbating global food crises by diverting agricultural land from food to fuel, leading to skyrocketing food prices and potential starvation for millions. As of December, 37 countries are facing food shortages, with the U.N. reporting a $500 million funding shortfall to assist 89 million people in need. The rising costs of staple foods, such as bread and cooking oil, have prompted governments like Egypt's to reconsider food subsidies, sparking public unrest. Critics argue that biofuels are not a sustainable solution and that the focus should shift to alternatives like algae fuels, which do not compete with food production. The ongoing debate highlights the urgent need for policy changes to prioritize food security over biofuel subsidies.
  • #101
esbo said:
...
Tom in part 5 occasionallylike when he said 0-50 in 4 seconds and also something
about lithium batteries (still can't make that bit out), was something to do with it
not being a heavy metal.
Zero to 60 in 4 seconds.
http://www.teslamotors.com/performance/perf_specs.php
Uses Li Ion batteries and yes Lithium is not a heavy metal so its easy on the environment.
 
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  • #102
the ultimate boifuel

I read this artical a little while back anout spme people in texas working on using cultured algi as a biofuel. This would make a lot of sense because they don't affect the food market and large quantities of it can be grown in green houses without even using soil.
 
  • #103
CrazyAnarcho said:
I read this artical a little while back anout spme people in texas working on using cultured algi as a biofuel. This would make a lot of sense because they don't affect the food market and large quantities of it can be grown in green houses without even using soil.

Algae to the rescue
https://www.physicsforums.com/showthread.php?t=211274
 
  • #104
Biomass from industrial hemp cultivation can be used to create methanol, and far more than corn can per acre.
The oil from hemp seeds can also bo used for biodiesel.
(interestingly, the first diesel engine was ran on plant oils, more specifically hempseed oil)

While providing energy needs, hempseed oil has amazing nutritional attributes (http://raskin8500-226.rutgers.edu/~alexanderpoulev/HempOil.pdf )

Industrial hemp can also be used to make any grade of paper, and hemp paper will not turn yellow over time. Why use rainforests?

Hemp fibre (the longest and strongest natural fibre known) can also be used to strong beams and other construction materials, which would also lessen the need for deforestation.

The roots of a hemp plant will (and do) grow almost anywhere and replenish the soil with nitrogen, making it perfect for use between crop rotations.
 
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  • #105
Wikipedia - Hemp:

Industrial hemp has thousands of potential uses, from paper to textiles to biodegradable plastics to health food to fuel but it has not been the great commercial success that the enthusiast hoped for in countries where it is legal to harvest. It is one of the fastest growing biomasses on the planet, and one of the earliest domesticated plants known. It also runs parallel with the "Green Future" objectives that are becoming increasingly popular. Hemp
requires little to no pesticides, replenishes soil with nutrients and nitrogen, controls erosion of the topsoil, and produces lots of oxygen, considering how fast it grows. Furthermore, Hemp could be used to replace many potentially harmful products, such as tree paper (the process of which uses bleaches and other toxic chemicals, apart from contributing to deforestation), cosmetics (which often contain synthetic oils that can clog pores and provide little nutritional content for the skin), plastics (which are petroleum based and cannot decompose), and more.

I know it is wikipedia...

Popular Mechanics - 1938 - New Billion Dollar Crop:

Hemp is the standard fiber of the world. It has great tensile strength and durability. It is used to produce more than 5,000 textile products, ranging from rope to fine laces, and the woody "hurds" remaining after the fiber has been removed contain more than seventy-seven per cent cellulose, and can be used to produce more than 25,000 products, ranging from dynamite to Cellophane.

From the farmers' point of view, hemp is an easy crop to grow and will yield from three to six tons per acre on any land that will grow corn, wheat, or oats. It has a short growing season, so that it can be planted after other crops are in. It can be grown in any state of the union. The long roots penetrate and break the soil to leave it in perfect condition for the next year's crop. The dense shock of leaves, eight to twelve feet above the ground, chokes out weeds. Two successive crops are enough to reclaim land that has been abandoned because of Canadian thistles or quack grass.

However, the connection of hemp as a crop and marijuana seems to be exaggerated. The drug is usually produced from wild hemp or locoweed which can be found on vacant lots and along railroad tracks in every state. If federal regulations can be drawn to protect the public without preventing the legitimate culture of hemp, this new crop can add immeasurably to American agriculture and industry.

And that was back when a billion dollars meant something.

The Composition of Hemp Seed Oil
and Its Potential as an Important Source
of Nutrition:


Introduction
Hemp (Cannabis sativa L.) seed oil is valued primarily for its
nutritional properties as well as for the health benefits associated with
it. Although its fatty acid composition is most often noted, with oil
content ranging from 25-35%, whole hemp seed is additionally comprised
of approximately 20-25% protein, 20-30% carbohydrates, and
10-15% fiber, along with an array of trace minerals (Deferne and Pate,
1996). With a complete source of all essential amino and fatty acids,
hemp seed oil is a complete nutritional source. In addition, constituents
exist within the oil that have been shown to exhibit pharmacological
activity (Deferne and Pate, 1996; Erasmus, 1999).

Hemp seed oil contains linoleic acid (LA) and alpha-linolic acid
(LNA) as its major omega-6 and omega-3 polyunsaturated fatty acids
(PUFA), respectively. These fatty acids comprise the most desirable
contents of the oil, especially due to the ratios in which they exist. The
3:1 ratio of LA to LNA is alleged to be optimal for nutrition (Deferne
and Pate, 1996; Callaway, Tennila & Pate, 1996; Erasmus, 1999). The
additional presence of gamma-linolenic acid (GLA) in hemp seed oil
ultimately makes its nutritional value superior to most comparable
seed oils. The myriad of benefits reported to be attributable to omega-
3 PUFA include anticancer, anti-inflammatory, and anti-thrombotic
properties. In addition, dietary omega-3 PUFA help to increase general
metabolic rates and promote the burning of fat (Erasmus, 1999; Simopoulos,
1994)

You absolutely must read this paper!
[http://raskin8500-226.rutgers.edu/~alexanderpoulev/HempOil.pdf]
 
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  • #106
H8wm4m said:
Biomass from industrial hemp cultivation can be used to create methanol, and far more than corn can per acre. ...
Cellulosic is still too inefficient and therefore unaffordable. Check back in a couple years.
 
  • #107
First of all, please excuse my oversimplification of the subject, and my slightly off-topic post.
Your response prompted me to do a bit more research.

mheslep said:
Cellulosic is still too inefficient and therefore unaffordable. Check back in a couple years.

Do you mean that cellulosic ethanol cannot compete with corn ethanol prices?

While it is true that cellulosic ethanol is currently more costly for the consumer than corn ethanol,
how does one judge which is the more viable ethanol of the future?

What factors must be weighed?

Can anyone biofuel solely supply the worlds liquid fuel needs?

There seems to be a general consensus that the production of corn ethanol is not economically sustainable.
I am of the opinion that the production of corn ethanol is not environmentially sustainable, especially when compared to the environmental benefits of industrial hemp cultivation.

- Industrial hemp renews soil unsuitable for other crops by breaking it up, choking out weeds, and resupplying it with nitrogen and other nutrients.
- Industrial hemp requires little or no pesticides or fertilizers due to its natural resistance and quick growth, thus reducing pollution.
- Industrial hemp is one of the fastest growing biomasses on the planet, making it the best choice for cellulosic ethanol production and thus saving valuable farmland.
- Industrial hemp can be used made over 25,000 products (as of 1938) so if ethanol demand falls, hemp crops can still be used for construction purposes, plastics, food, and more.

I am interested in hearing responses from others to the above boldfaced questions.
 
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  • #108
Some thoughts

Hemp requires cultivated land to grow. So does crops for food. Biofuels should not compete with food. There are priorities.

Ethanol (C2H4OH) is already a partly oxidized product of sugars, hence it's energy production is inferior to other hydrocarbonates.

The energy production of any biofuel is limited to a fraction of a fraction of a fraction of the incoming solar light energy in the order of magnitude of several 100 W/m2

First fraction: The absorbed light used in the photosynthetic process may only be a few W/m2

Second fraction: The part of the crop, suitable to fuel production is limited.

Third fraction: the loss due to conversion, transport and limited efficiency in combustion engines.

It's very likely that the area required to grow biofuel for sustainment of the energy demand exceeds area available by orders of magnitude, while we need all that area to feed mankind.

Finally, crops have a tendency to fail occasionally.
 
  • #109
Andre said:
...

First fraction: The absorbed light used in the photosynthetic process may only be a few W/m2

Second fraction: The part of the crop, suitable to fuel production is limited.

Third fraction: the loss due to conversion, transport and limited efficiency in combustion engines.

It's very likely that the area required to grow biofuel for sustainment of the energy demand exceeds area available by orders of magnitude, while we need all that area to feed mankind.

Finally, crops have a tendency to fail occasionally.
I thought this was already discussed over on the Algae thread https://www.physicsforums.com/showpost.php?p=1586559&postcount=4" where it was shown it depends on the biofuel, but it could be done in a very reasonable land area. In particular a biocrop producing 10,000 gal/acre - year could supply the entire US oil market in 19,000 sq mi. By comparison, Corn ethanol at a gross 400gal/acre-year currently uses ~23k sq miles in the US. Its just not cost effective yet.
 
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