Citizen scientists work at the frontline of climate change research

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A “citizen scientist” network called Project BudBurst uses everyday observers to collect climate change data related to the leafing and flowering of flora across the United States. Armed with a Web site and thousands of participants, the project notes early flowering trends and other anomalies, which one environmentalist says are a symptom of "global weirding.”Guest: Project BudBurst co-founder Kayri Havens. Havens is the director of plant science and conservation at the Chicago Botanic Garden.