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Global food security under climate change.

Josef Schmidhuber1, Francesco N Tubiello

  • 1Global Perspective Studies Unit, Food and Agriculture Organization, 00100 Rome, Italy. josef.schmidhuber@fao.org

Proceedings of the National Academy of Sciences of the United States of America
|December 14, 2007
PubMed
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Climate change significantly impacts food security, particularly availability, with millions more at risk of hunger. Other factors like access and utilization also face threats, requiring further research.

Area of Science:

  • Environmental science
  • Agricultural science
  • Climate science

Background:

  • Food security is a critical global challenge.
  • Climate change poses a multifaceted threat to global food systems.
  • Current research often focuses narrowly on food availability.

Purpose of the Study:

  • To review climate change impacts on all dimensions of food security.
  • To assess the limitations of current simulation studies.
  • To propose future research directions.

Main Methods:

  • Qualitative review of published literature.
  • Analysis of simulation studies on climate change and food security.
  • Discussion of strengths and weaknesses of existing assessment methodologies.

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Main Results:

  • Climate change significantly affects food availability, with projected increases in hunger ranging from 5 to 170 million people by 2080.
  • Socio-economic development assumptions heavily influence impact projections.
  • Impacts on food stability, utilization, and access are substantial but less frequently modeled.

Conclusions:

  • Current models inadequately capture the full scope of climate change impacts on food security.
  • Further research is needed to qualitatively and quantitatively assess risks to food stability, utilization, and access.
  • Improved assessment methodologies are crucial for effective adaptation strategies.