12.03.2009 7:37 am/Matthew Gipp
A Question of Scale
Lost productivity during the recession has caused a net reduction in greenhouse gas emissions roughly equivalent to the reduction that would result from shutting the planet down for three days.
NPR’s David Kestenbaum wonders whether it has left behind an ecological record—tree rings, ice gas-bubbles, etc—that could someday be ‘read’ by alien visitors.
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