Climate Changed

How High Does Carbon Need to Be? Somewhere From $20-$27,000

  • Scientists say market forces could help rein in global warming
  • World is on track to warm 3 degrees Celsisus, double UN’s goal
Photographer: Luke Sharrett/Bloomberg
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The idea that carbon markets can help rein in greenhouse gas emissions got fresh momentum this week from a panel of scientists convened by the United Nations.

But whether the idea gains more political currency this time depends on the price that policymakers set for emitting Earth-warming carbon dioxide into the atmosphere. The UN panel set out a number of scenarios, suggesting that markets alone won’t solve the problem.