Highlights

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    Meta-analysis of agroecology’s impact on biodiversity and climate change mitigation.
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    Agroecological interventions increase biodiversity of all studied functional groups.
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    Biodiversity effects were positive for all agricultural land-use types except horticulture.
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    Soil C storage and N2O mitigation increase, but not CH4 and CO2 mitigation.
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    Transitions to input substitution or to redesign provide similar benefits.