Distribution of Salvinia; depletion of water resources and hindrance to water use by Salvinia; Environmental impact of Salvinia; control of Salvinia; Utilisation of Salvinia; Anaerobic digestion; Feasibility studies on Salvinia for energy production; Effect of weed: Water ratio on bio-gas production from Salvinia; Effect of temperature On biogas production from aquatic fern Salvinia; Bio-energy potential of eight common aquatic weeds; Survivability and growth of Salvinia molesta (Mitchell) over water treated with heavy metals and subsequent utilisation of the harvested weeds for energy (Bio-mass) production; Use of aquatic weed Salvinia As full/ partial feed in commercial bio-gas disasters; Design and performance elevation of a fern shredder; Studies on multiphase Anaerobic digestion of aquatic weed Salvinia; Productivity (Net primary production) in natural waters.