The rainforest consists of several layers. Each layer has plants and animals which are adapted to the conditions found there. In the ground layer, soil is poor and any nutrients are quickly recycled. The next layer is made up of shrubs and plants which can tolerate low light levels. The lush undercanopy consists of smaller trees which compete for the light and space. Epiphytes are found in the undercanopy.
In additon. biofuels may be marketed as good, renewable, sustainable or next generation, partly for promotional purposes. So achieving a widely accepted definition of advanced and/or sustainable biofuels is a challenge. Often the term is applied to biofuels produced from lignocellulosic (LC) or cellulosic biomass.io-oil can be used as a heating fuel or can be further converted to advanced biofuels. Torrefaction (heating at 200-300 Â°C in the absence of oxygen, at atmopsheric pressure) converts biomass to bio-coal, which can be more easily used for power generation than untreated biomass.
Biodiesel can be used as a fuel for vehicles in its pure form, but it is usually used as a diesel additive to reduce levels of particulates, carbon monoxide, and hydrocarbons from diesel-powered vehicles. Biodiesel is produced from oils or fats using transesterification and is the most common biofuel in Europe.iogas is methane produced by the process of anaerobic digestion of organic material by anaerobes. It can be produced either from biodegradable waste materials or by the use of energy crops fed into anaerobic digesters to supplement gas yields. The solid byproduct, digestate, can be used as a biofuel or a fertilizer.