Climate change’s giant impact on the economy: 4 key issues

Repairing electric in PATH tunnel after Sandy

NEIL IRWIN / NY TIMES – By now, it’s clear that climate change poses environmental risks beyond anything seen in the modern age. But we’re only starting to come to grips with the potential economic effects.

Using increasingly sophisticated modeling, researchers are calculating how each tenth of a degree of global warming is likely to play out in economic terms. Their projections carry large bands of uncertainty, because of the vagaries of human behavior and the remaining questions about how quickly the planet will respond to the buildup of greenhouse gases.

A government report in November raised the prospect that a warmer planet could mean a big hit to G.D.P. in the coming decades …

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