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CO2 in the atmosphere just exceeded 415 parts per million for the first time in human history | TechCrunch
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Kidde Recalls TruSense Smoke and Combination Smoke/Carbon Monoxide Alarms Due to Risk of Failure to Alert Consumers to a Fire | CPSC.gov
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Kidde Smoke & Carbon Monoxide Detector with Voice Alerts, Battery Powered, Combination Smoke & CO Alarm - Amazon.com
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Kidde 10-Year Worry Free Smoke & Carbon Monoxide Detector, Lithium Battery Powered with Voice Alarm, 2-Pack 21029621 - The Home Depot
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