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Sökning: WFRF:(Ramankutty Navin)

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1.
  • Campbell, Bruce M., et al. (författare)
  • Agriculture production as a major driver of the Earth system exceeding planetary boundaries
  • 2017
  • Ingår i: Ecology & Society. - : Resilience Alliance. - 1708-3087. ; 22:4
  • Tidskriftsartikel (refereegranskat)abstract
    • We explore the role of agriculture in destabilizing the Earth system at the planetary scale, through examining nine planetary boundaries, or safe limits: land-system change, freshwater use, biogeochemical flows, biosphere integrity, climate change, ocean acidification, stratospheric ozone depletion, atmospheric aerosol loading, and introduction of novel entities. Two planetary boundaries have been fully transgressed, i.e., are at high risk, biosphere integrity and biogeochemical flows, and agriculture has been the major driver of the transgression. Three are in a zone of uncertainty i.e., at increasing risk, with agriculture the major driver of two of those, land-system change and freshwater use, and a significant contributor to the third, climate change. Agriculture is also a significant or major contributor to change for many of those planetary boundaries still in the safe zone. To reduce the role of agriculture in transgressing planetary boundaries, many interventions will be needed, including those in broader food systems.
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2.
  • Chrysafi, Anna, et al. (författare)
  • Quantifying Earth system interactions for sustainable food production via expert elicitation
  • 2022
  • Ingår i: Nature Sustainability. - 2398-9629.
  • Tidskriftsartikel (refereegranskat)abstract
    • Several safe boundaries of critical Earth system processes have already been crossed due to human perturbations; not accounting for their interactions may further narrow the safe operating space for humanity. Using expert knowledge elicitation, we explored interactions among seven variables representing Earth system processes relevant to food production, identifying many interactions little explored in Earth system literature. We found that green water and land system change affect other Earth system processes strongly, while land, freshwater and ocean components of biosphere integrity are the most impacted by other Earth system processes, most notably blue water and biogeochemical flows. We also mapped a complex network of mechanisms mediating these interactions and created a future research prioritization scheme based on interaction strengths and existing knowledge gaps. Our study improves the understanding of Earth system interactions, with sustainability implications including improved Earth system modelling and more explicit biophysical limits for future food production.
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3.
  • Foley, Jonathan A., et al. (författare)
  • Solutions for a cultivated planet
  • 2011
  • Ingår i: Nature. - 0028-0836 .- 1476-4687. ; 478:7369, s. 337-342
  • Tidskriftsartikel (refereegranskat)abstract
    • Increasing population and consumption are placing unprecedented demands on agriculture and natural resources. Today, approximately a billion people are chronically malnourished while our agricultural systems are concurrently degrading land, water, biodiversity and climate on a global scale. To meet the world's future food security and sustainability needs, food production must grow substantially while, at the same time, agriculture's environmental footprint must shrink dramatically. Here we analyse solutions to this dilemma, showing that tremendous progress could be made by halting agricultural expansion, closing 'yield gaps' on underperforming lands, increasing cropping efficiency, shifting diets and reducing waste. Together, these strategies could double food production while greatly reducing the environmental impacts of agriculture.
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