Abstract
Bioenergy is one of the forms of renewable energy. Biorenewables contain all sustainable bioenergy feedstocks. Bioenergy can always be considered as a form of renewable energy. Biomass resources include wood and wood wastes; agricultural crops and their waste byproducts; municipal solid waste; animal wastes; waste from food processing; and aquatic plants and algae. Recently, the studies have been focused on developing new crops and cropping systems that can be used as dedicated bioenergy feedstock. Switchgrass, hybrid poplars, and hybrid willows are among these dedicated crops. Biomass is commonly recognized as an important renewable energy, which is considered to be such a resource that during the growth of plants and trees solar energy is stored as chemical energy via photosynthesis, which can be released via direct or indirect combustion. There are three ways to use biomass. It can be burned to produce heat and electricity, changed to gas-like fuels such as methane, hydrogen and carbon monoxide or changed to a liquid fuel. In the last decade, there are rapid progresses in biofuel marketing trend: increasing production capacity, increasing international material flows, increased competition with conventional agriculture, increased competition with forest industries, increasing international trade flows, and strong international debate about the sustainability of biofuels production.