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Related Concept Videos

What is Climate?01:16

What is Climate?

Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
Global Climate Change01:50

Global Climate Change

Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
Microbes and Climate Change01:27

Microbes and Climate Change

Microorganisms are pivotal agents in Earth's biogeochemical cycles, significantly influencing climate dynamics through their metabolic activities. These microbes modulate the levels of key greenhouse gases by both contributing to and helping mitigate climate change.Microbial Contributions to Greenhouse Gas EmissionsRising global temperatures accelerate microbial metabolism, which, in turn, speeds up the decomposition of organic matter. This process releases carbon dioxide (CO₂) through...
Responses to Heat and Cold Stress02:45

Responses to Heat and Cold Stress

Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
Threats to Biodiversity01:50

Threats to Biodiversity

There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.

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Related Experiment Video

Updated: May 9, 2026

High Throughput Image-Based Phenotyping for Determining Morphological and Physiological Responses to Single and Combined Stresses in Potato
06:28

High Throughput Image-Based Phenotyping for Determining Morphological and Physiological Responses to Single and Combined Stresses in Potato

Published on: June 7, 2024

Climate change impacts on global food security.

Tim Wheeler1, Joachim von Braun

  • 1Walker Institute for Climate System Research, Department of Agriculture, University of Reading, Reading, UK. t.r.wheeler@reading.ac.uk

Science (New York, N.Y.)
|August 3, 2013
PubMed
Summary

Climate change threatens global food security by impacting crop yields and food system stability. Investing in climate-smart food systems is crucial for adaptation and mitigation efforts to ensure future food availability.

Area of Science:

  • Agricultural Science
  • Climate Science
  • Food Security Studies

Background:

  • Climate change poses a significant threat to global food security.
  • Progress towards a hunger-free world may be jeopardized by these climate impacts.
  • Existing food systems face risks due to climate-induced supply variability.

Purpose of the Study:

  • To analyze the discernible global patterns of climate change impacts on crop productivity.
  • To assess the potential consequences for food availability and food system stability.
  • To highlight the need for adaptation and mitigation strategies in food systems.

Main Methods:

  • Analysis of global patterns of climate change effects on crop productivity.
  • Assessment of climate variability and change impacts on regional food insecurity.

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Last Updated: May 9, 2026

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  • Evaluation of indirect effects on food access, utilization, income, and health.

    • Main Results:

    • A clear global pattern exists showing climate change impacts on crop productivity, affecting food availability.
    • Climate variability and change are likely to worsen food insecurity in vulnerable regions.
    • Food access and utilization may be indirectly impaired through economic and health impacts.

    Conclusions:

    • Climate change poses a substantial risk to global food security and progress in hunger reduction.
    • Urgent and significant investment is needed for adaptation and mitigation actions.
    • Developing a "climate-smart food system" is essential to build resilience against climate change influences on food security.