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Genetically Modified (GM) Crop Use 1996-2020: Impacts on Carbon Emissions.

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Genetically modified (GM) crop technology significantly reduced greenhouse gas emissions by cutting fuel use and enabling no-tillage farming. In 2020, GM crops saved 23,631 million kg of CO2, equivalent to removing 15.6 million cars from the road.

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Area of Science:

  • Agricultural Science
  • Environmental Science
  • Biotechnology

Background:

  • Genetically modified (GM) seed technology includes herbicide-tolerant and insect-resistant crops.
  • These technologies aim to improve weed and pest control, impacting farming practices.
  • Previous assessments have not fully quantified the global impact on greenhouse gas emissions.

Purpose of the Study:

  • To assess the global impact of GM crop seed technology on greenhouse gas emissions.
  • To quantify reductions in fuel use and changes in tillage practices associated with GM crops.
  • To determine the overall effect on carbon dioxide (CO2) emissions from agriculture.

Main Methods:

  • Analysis of GM crop adoption and associated farming practices over a 24-year period up to 2020.
  • Evaluation of changes in on-farm fuel consumption related to herbicide and insecticide use.
  • Assessment of shifts from conventional plow-based systems to reduced and no-tillage farming.

Main Results:

  • Widespread adoption of GM insect-resistant and herbicide-tolerant seeds has led to significant cuts in on-farm fuel use.
  • GM technology facilitated a transition to reduced and no-tillage systems, improving soil health and reducing emissions.
  • In 2020, GM cropping resulted in greenhouse gas savings of 23,631 million kg of CO2 equivalent.

Conclusions:

  • GM crop technology has demonstrably reduced greenhouse gas emissions globally.
  • The shift towards conservation tillage practices, enabled by GM crops, is a key factor in emission reductions.
  • GM technology offers a substantial environmental benefit by mitigating climate change impacts from agriculture.