for est ▁and ▁b iod iversity . ▁ ▁It ▁has ▁been ▁estimated ▁in ▁Germany ▁that ▁pal m ▁oil ▁b iod ies el ▁has ▁less ▁than ▁one ▁third ▁of ▁the ▁production ▁costs ▁of ▁rap ese ed ▁b iod ies el . ▁The ▁direct ▁source ▁of ▁the ▁energy ▁content ▁of ▁b iod ies el ▁is ▁solar ▁energy ▁captured ▁by ▁plants ▁during ▁photos yn thesis . ▁Regarding ▁the ▁positive ▁energy ▁balance ▁of ▁b iod ies el : ▁When ▁st raw ▁was ▁left ▁in ▁the ▁field , ▁b iod ies el ▁production ▁was ▁strongly ▁energy ▁positive , ▁yield ing ▁ 1 ▁G J ▁b iod ies el ▁for ▁every ▁ 0 . 5 6 1 ▁G J ▁of ▁energy ▁input ▁( a ▁yield / cost ▁ratio ▁of ▁ 1 . 7 8 ). ▁When ▁st raw ▁was ▁burn ed ▁as ▁fuel ▁and ▁oil seed ▁rap eme al ▁was ▁used ▁as ▁a ▁fert il izer , ▁the ▁yield / cost ▁ratio ▁for ▁b iod ies el ▁production ▁was ▁even ▁better ▁( 3 . 7 1 ). ▁In ▁other ▁words , ▁for ▁every ▁unit ▁of ▁energy ▁input ▁to ▁produce ▁b iod ies el , ▁the ▁output ▁was ▁ 3 . 7 1 ▁units ▁( the ▁difference ▁of ▁ 2 . 7 1 ▁units ▁would ▁be ▁from ▁solar ▁energy ). ▁ ▁Econom ic ▁impact ▁Multiple ▁economic ▁studies ▁have ▁been ▁performed ▁regarding ▁the ▁economic ▁impact ▁of ▁b iod ies el ▁production . ▁One ▁study , ▁commission ed ▁by ▁the ▁National ▁B iod ies el ▁Board , ▁reported ▁the ▁production ▁of ▁b