Land is finite, population is still expanding and the motor car's dominance may not last much longer.

ECONOMIST: With age, cities go centrifugal��but maybe not for ever

Ultimately the success of in-vitro meat may be less about consumer sensibilities and more about the hard realities of feeding a growing global population in a finite world.

CNN: In-vitro meat: Would lab-burgers be better for us and the planet?

But unlike finite fossil fuels, this resource continues to grow, driven by increasing GDP, population, and service loads.

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