At present, plants and agricultural sciences are playing a leading role in providing solutions to problems created by an ever growing world population. Through plant biotechnology scientists are seeking ways to improve crop functions that rapidly promote food production. Agricultural science is being used to experiment with producing plants tolerant to environmental stresses such as drought, salinity and coldness. Of the plant species, woody plants are producing the most abundant biomass resources, playing important roles in the suppression of carbon dioxide increase and supplying huge energy.