Roger S. Pulwarty is the chief of the Climate and Societal Interactions Division and the director of the National Integrated Drought Information System at NOAA. His research focuses on climate variability and change, social and environmental vulnerability, and on developing climate information services in the United States, Latin America, and the Caribbean. Pulwarty is a lead author on the IPCC Fourth Assessment Report (2007), the IPCC Special Report on Managing Extreme Events and Disasters (2011), and the UNISDR Global Assessment of Disaster Risk Reduction (2011).

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By 2080 the effects of climate change—on heat waves, floods, sea level rise, and drought—could push an additional 600 million people into malnutrition and increase the number of people facing water scarcity by 1.8 billion.1 The precise impacts will, however, strongly depend on socioeconomic conditions such as local markets and food import …

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