In the third in a series of national assessments calculating the potential supply of biomass in the United States, the US Energy Department concluded in 2016 that the country has the future potential to produce at least one billion dry tons of biomass resources annually without adversely affecting the environment. This amount of biomass could be used to produce enough biofuel, biopower, and will bioproducts to displace approximately 30% of 2005 U.S. petroleum consumption, said the report, without negatively affecting the production of food or other agricultural products.
Energy Independence
A documentary film called Pump tells the tale of the monopolization of the auto fuel industry by the petroleum cartel, and how that monopoly can be ended with a choice of biofuels at the pump.
Henry Ford's first car, built in 1896, ran 100% on alcohol fuel, produced by farmers using using beets, apples, corn and other starchy crops in their own stills. He envisioned the family piling into the car and driving through the countryside, fueling up along the road at independent farms. But alcohol was burdened with a liquor tax, and John D. Rockefeller saw a use for the gasoline fuel that was being discarded as a toxic waste product of the kerosene market he had cornered. In 1908, Ford accommodated Rockefeller's gasoline fuel by building America's first "flex-fuel" car, the Model T or "Tin Lizzie." It could be made to run on either gasoline or ethanol by adjusting the ignition timing and air fuel mixture. Rockefeller then blocked competition from Ford's ethanol fuel by using his power and influence to help pass Prohibition, a Constitutional amendment banning the sale and transport of alcohol.
The petroleum monopoly was first broken in Brazil, where most cars are adapted to run on bioethanol made from sugar cane. Existing combustion engines can be converted to use this "flex fuel" with simple, inexpensive kits. The Brazilian biofuel market dates back to the oil crisis of the 1970s, when gas had to be imported and was quite expensive. With the conversion to biofuels, Pres. Luiz Ina'cio Lula da Silva achieved national energy independence, giving a major boost to the struggling Brazilian economy.
The U.S. push for biofuels was begun in California in the 1980s, when Ford Motor Company was enlisted to design a flex fuel car to help reduce the state's smog problem. But again the oil industry lobbied against it. They argued that bioethanol, which in the U.S. is chiefly made from corn, was competing for corn as a foodstuff at a time when food shortages were a major concern.
David Blume counters that it is not a question of "food or fuel" but "food and fuel." Most U.S. corn is grown as livestock feed, and the "distillers grains" left after the alcohol is removed are more easily digested by cows than unprocessed grain. Distillers grains have another advantage over hay as a livestock feed: its easier digestion reduces the noxious cow emissions said to be a significant source of greenhouse gases.
Fuel from a Weed: The Wide-ranging Virtues of Hemp
Opponents, however, continue to raise the "food versus fuel" objection, and they claim that biofuels from corn are not "carbon neutral" when the steps used to create them are factored in. Even the fertilizers needed to grow them may emit CO2 and other greenhouse gases. But corn is not the only biofuel option. There are plants that can grow like weeds on poor soil without fertilizers.
Industrial hemp -- the non-intoxicating form of cannabis grown for fiber, cloth, oil, and many other purposes -- is a prime candidate not just for fuel but to help save the environment. Hemp has been proven to absorb more CO2 per hectare than any forest or commercial crop, making it the ideal carbon sink. It can be grown on a wide scale on nutrient poor soils; it grows remarkably fast with almost no fertilizer or irrigation; and it returns around 70% of the nutrients used in the growth cycle back to the soil. Biofuels usually require substantially more water than fossil fuels, but hemp needs roughly half the amount needed for corn. Hemp can also be used for "bioremediation" -- the restoration of soil from toxic pollution. It helps remove toxins and has been used by farmers to "cure" their fields, even from radioactive agents, metals, pesticides, crude oil, and toxins in landfills.
An analysis published in the journal Science in 2019 concluded that a worldwide tree planting program could remove two-thirds of all the CO2 emissions that have been pumped into the atmosphere by human activities. As reported in The Guardian in 2019, one trillion trees could be restored for as little as $300 billion -- "by far the cheapest solution that has ever been proposed." The chief drawback to that solution is that trees grow slowly, requiring 50 to 100 years to reach their full carbon sequestering potential. Hemp, on the other hand, is one of the fastest CO2-to-biomass conversion tools available, growing to 13 feet in 100 days. It also requires much less space per plant than trees, and it can be grown on nearly any type of soil without fertilizers.
In a 2015 book titled "Cannabis Vs. Climate Change," Paul von Hartmann notes that hemp is also one of the richest available sources of aromatic terpenes, which are known to slow climate change. When emitted by pine forests, terpenes help to cool the planet by bouncing energy from the sun back into space. In a mature hemp field, the temperature on a hot day can be 20 degrees cooler than in surrounding areas.
Reviving an American Staple
Hemp has many uses besides fuel. Long an American staple, its cultivation was mandated in colonial America. It has been used for centuries in pharmaceuticals, clothing and textiles; it is an excellent construction material; its fiber can be used to make paper, saving the forests; and hemp seeds are , providing protein equivalent by weight to beef or lamb.
The value of industrial hemp has long been known by the U.S. government, which produced an informational film in 1942 called "Hemp for Victory" to encourage farmers to grow it for the war effort. Besides its many industrial uses, including for cloth and cordage, the film detailed the history of the plant's use and best growing practices.
Henry Ford used hemp as a construction material for his Model T, and Porsche is now using hemp-based material in the body of its 718 Cayman GT4 Clubsport track car to reduce its weight while maintaining rigidity and safety. "Hempcrete" (concrete made from hemp mixed with lime) is a "green" building material used for construction and insulation, including for building "tiny homes."
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