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This is our greatest challenge: learning to live in a crowded and interconnected world that is creating unprecedented pressures on human society and on the physical environment.

Jeffrey Sachs
Creating, Challenges, World
"Lecture 1 by Jeffrey Sachs, at the Royal Society, London". www.bbc.co.uk. 2007.
This is our greatest challenge: learning to live in a crowded and interconnected world that is creating unprecedented pressures on human society and on the physical environment.