近年来大量的重点一直放在发现替代能源。能源可分为再生能源和非再生能源。煤炭、石油产品受到不可再生能源。世界是很大程度上依赖不可再生资源。有很多缺点等不可再生资源的将来他们会筋疲力尽,也造成污染。因此大量的重点是发现一个替代燃料。生物燃料是一种可替代的能源是收到很多重点。最初生物燃料收到很多积极回应但是后来有许多伦理问题被提出的不同的单位和个人。专家和环保人士已经开始提高生物燃料的可持续性问题(Koh & Ghazoul,2008)。
In the recent years a lot of emphasis has been placed on discovering alternative sources of energy. Sources of energy can be classified as renewable and non- renewable sources of energy. Coal, petroleum products come under non-renewable sources of energy. World is largely dependent on non-renewable sources. There are lots of disadvantages of non-renewable sources like they will get exhausted in the future and also create pollution. Hence a lot of emphasis is being placed on discovering an alternative fuels. Biofuel is an alternative source of energy which is receiving a lot of emphasis. Initially biofuel received a lot of positive response however later there were many ethical issues which are being raised by different entities and individuals. Experts and environmentalists have started raising questions on the sustainability of the biofuel (Koh & Ghazoul, 2008).