The approach is based on the argument that organic food requires a larger area of land, so it contributes more to deforestation. The data source was statistics on total production in Sweden — yields per hectare for organic versus conventional agriculture for 2013-2015.
Findings in Sweden showed that yields from organic food per hectare were much lower – mainly because there was no fertilizer used. Thus, a much larger area of land was needed to produce organic food with the same amount of that produced by a conventional method.
https://www.neweurope.eu/article/organic-farming-and-climate-change/