<p>Promoting agrobiodiversity is increasingly favoured as a solution to the challenges modern agriculture faces, offering benefits such as improved landscape conditions and nutritional outcomes. However, the global extent to which diversified crop production affects greenhouse gas (GHG) emissions and nutrient availability - along with identifying which crops to prioritize - remains unclear. In the present study, we used optimization models to first demonstrate the potential of reducing GHGs by diversifying global crop production quantities, and secondly, the impact of increased cultivation of undervalued crops on the economic and nutritional value of crop production. We observed that a select number of undervalued crops can drive GHG reduction, yet in certain cases, major crops were more favoured to reduce GHGs. Nonetheless, increasing the production of undervalued crops also increased nutrient availability. We thus provide more evidence that strategic policies on diversifying crop production can aid in the reduction of total GHGs while maintaining sufficient nutrients to circulate across crop production systems.</p>