One of the main concern for first generation biodiesel production is the competition with food and fiber production for use of arable land. In particular, there are still concerns for the high cost; the lack of regional market structure as well as well managed agricultural practices in emerging economies.  Water and fertilizer use is also an issue to considered as farming practices that could ultimately affect the conservation of bio-diversity. Furthermore, Some plant species that are being used for feedstock can become invasive if not native to the local ecosystem.

Reference:

“JOURNAL OF BIOSCIENCE AND BIOENGINEERING: Biodiesel fuel production by trans esterification of oils HIDEKl FUKUDA,‘* AKIHIKO KOND0,2 AND HIDE0 NODA, 2001)