Why is biodiesel not normal carbon neutral?

Biodiesel is often considered less carbon neutral than initially thought due to several factors, including land use changes, deforestation, and the energy-intensive processes involved in its production. The cultivation of feedstocks for biodiesel can lead to the release of stored carbon in soils and forests, undermining its environmental benefits. Additionally, the use of fertilizers and pesticides in growing these crops contributes to greenhouse gas emissions. Thus, while biodiesel reduces reliance on fossil fuels, its overall impact on carbon emissions may not be as neutral as assumed.