 The adoption of non-land based feedstock or "advanced biofuels" derived from wastes and bacteria has proven to be a more sustainable solution than conventional biofuels.However, proposals of the revised RED II target to phase out conventional biofuels has received many criticisms; "miraculously relying on a successful transition to advanced biofuels" has not been backed by science or logic, according to former Irish minister for the environment, Dick Roche.The infrastructure and technologies are not yet established to be able to perform such processes efficiently, and sudden removal of biofuels could lead to drastic pressure and overuse of other fuel sources.