Wind, solar, and other clean energy technologies have sprouted around the world in recent years, and deployment surged in 2013. Yet taken together, they still failed to prevent 2013 from notching the largest single-year growth in atmospheric carbon dioxide concentrations since the mid-1980s.

The World Meteorological Organization reported this week that carbon dioxide levels in the atmosphere last year experienced the largest one-year spurt since 1984. With a jump of 2.9 parts per million, the year-average concentration now stands at 396 parts per million. That’s about 42 percent higher than in 1750, before humans began digging up and burning coal, oil, and natural gas at a vast scale.

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