4. Future prospects and policies
Clearing lands rich with carbon habitats for growing biofuels
crops will increase carbon debt [29]. Thus, biofuels obtained from
crops which are grown in land meant for carbon rich habitats is
not sustainable. Moreover, cost of feedstocks accounts for 80–90%
cost of liquid biofuels [21]. In general, edible feedstocks are traded
in food markets and its value is completely affected by food and
biofuel demands. Alternatively, waste non-edible substances