Assertion: ozone | /r/CapableOf | increase the risk of premature death
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Source sentences:
text: Researchers repeatedly found that the risk of premature death increased with higher levels of ozone.9 Newer research has confirmed that ozone increased the risk of premature death even when other pollutants also are present.10
text: Researchers repeatedly found that the risk of premature death increased with higher levels of ozone.9,10,11 Newer research has confirmed that ozone increased the risk of premature death even when other pollutants also exist.12