Friday, February 17, 2017

You are not in control

You are not in control by Dmitry Orlov 

"It is often argued that a car is a necessity, although the facts tell a different story. Worldwide, there are 1.2 billion vehicles on the road. The population of the planet is over 7 billion. Therefore, there are at least 5.8 billion people alive in the world who don’t own a car. How can something be considered a necessity if 82% of us don’t seem to need it? In fact, owning a car becomes necessary only in a certain specific set of circumstances. Here are some of the key ingredients: a landscape that is impassable except by motor vehicle, single-use zoning that segregates land by residential, commercial, agricultural and industrial uses, a lifestyle that requires a daily commute, and a deficit of public transportation. In turn, widespread private car ownership is what enables these key ingredients: without it, situations.......
It turns out that the fact that so many people are forced to own a car has nothing to do with transportation and everything to do with petroleum chemistry. About half of what can be usefully extracted from a barrel of crude oil is in the form of gasoline. It is possible to boost the fraction of other, more useful products, such as kerosene, diesel fuel, jet fuel and heating oil, but not by much and at a cost of reduced net energy. But gasoline is not very useful at all. It is volatile (quite a lot of it evaporates, especially in the summer); it is chemically unstable and doesn’t keep for long; it is toxic and carcinogenic. It has a rather low flash point, limiting the compression ratio that can be achieved by gasoline-fueled engines, making them thermodynamically less efficient. It is useless for large engines, and is basically a small-engine fuel. Gasoline-powered engines don’t last very long because gasoline-air mixture is detonated (using an electric spark) rather than burned, and the shock waves from the detonations cause components to wear out quickly. They have few industrial uses; all of the serious transportation infrastructure, including locomotives, ships, jet aircraft, tractor-trailers, construction equipment and electrical generators run on petroleum distillates such as kerosene, jet fuel, diesel oil and bunker fuel."

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