After 80 years, elusive molecules reveal how ozone starts turning plant emissions into haze
Scientists have directly observed a fleeting chemical reaction that creates a key ingredient in urban smog. The research offers insight into the earliest stages of pollution formation and could help improve air quality forecasting models.

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Signal breakdown
CurrentWire ranked this story 60.2 of 100 in the snapshot this page was rendered from.
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- 30.7 of 35
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- Coverage breadth
- 4 of 20
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- Velocity
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Strongest signal: freshness, 30.7 of 35. How each signal is calculated.
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