1995 - [Elektronische Ressource]
substantially since the 1980s. In particular,
increases in energy efficiency, decontrol of oil and gas prices, and
changing OPEC … (Organization of Petroleum Exporting Coun-
tries) politics and global oil markets have resulted in lower energy
prices. At the same … agricultural programs.
Bioenergy crop productivityhas increased by more than 50 percent and costs have been sharply re-
duced in …