"Crude" density is achieved by districts packed with taller and taller buildings but doesn't, on its own, generate innovation or economic development.
WSJ: To Build Creative Cities, the Sky Has Its Limit by Richard Florida
The majority new oil being developed are heavy, sour crude oils which have a high sulfur content, high viscosity, and high density.
FORBES: China's Not Going Green
Sweet light crude oil yields the most gallons of gasoline per barrel of oil and since it has low viscosity and low density, it is comparatively inexpensive to pump, transport, and refine.
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