History of botany scope of the subject as technology has opened up new techniques and areas of study. Modern molecular systematics, for example, entails the principles and techniques of taxonomy, molecular biology, computer science and more. Within botany there are a number of sub-disciplines that focus on particular plant groups, each with their own range of related studies (anatomy, morphology etc.). Included here are: phycology (algae), pteridology (ferns), bryology (mosses and liverworts) and palaeobotany (fossil plants) and their histories are treated elsewhere (see side bar). To this list can be added mycology, the study of fungi, which were once treated as plants, but
Economics of nuclear power plants due to significantly lower labour rates. A 2008 study by former utility staffperson Craig A. Severance based on historical outcomes in the United States said costs for nuclear power can be expected to run $0.25–0.30 per kWh. A 2008 study concluded that if carbon capture and storage were required then nuclear power would be the cheapest source of electricity even at $4,038/kW in overnight capital cost. In 2009, MIT updated its 2003 study, concluding that inflation and rising construction costs had increased the overnight cost of nuclear power plants to about $4,000/kW, and thus increased the power cost to $0.084/kWh.