TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The washing and drying of seashells and eggshell is carried out at 110 degrees C. The calcination of sieved and dried seashell is carried out at 550 degrees C. The triglycerides are obtained from vegetable oils or animal fats. The method (p2) is carried out at a pressure of atmospheric to 90 bar (preferably 3-15 bar) and at 50-250 degrees C. Preferred Components: The natural waste materials are natural waste or fresh natural seashell and eggshells alone or in complex with alcohol or phenol. The ratio of seashells to eggshell varies from 90:10 to 10:90. The vegetable oils are edible vegetable oils obtained from plant sources selected from soybean, rapeseed, palm, mustard, or canola oils; or non-edible vegetable oils, where the non-edible vegetable oil sources are plant species selected from Jatropha, Pongamia, Madhuca indica, Neem, Niger and Rice bran oil. The alcohol is methanol, ethanol, propanol and/or butanol. The molar ratio of alcohol to oil is 20 to 1 (preferably 5 to 1). The vegetable oil is in the form of feed stocks containing 10-10000 ppm of water; or feed stocks containing 0-5% of free fatty acids. EXAMPLE - A grounded and sieved egg shells (90 g) and sea shells (10 g) were properly mixed physically and the mixture is calcined in a muffle furnace at 550 degrees C for using XRD spectroscopy. The XRD diffraction patterns and scanning micrograph images showed that the composition had calcium carbonate characteristics. The obtained catalyst composition (4 g) was taken in a 250 ml flask, to which sunflower oil (100 g) and methanol (30 g) were then added and stirred. Subsequently the reaction mixture was heated to 70 degrees C under reflux and stirred at this temperature for 8 hours. Progress of the reaction was monitored by thin layer chromatography using mixture of hexane, diethyl ether and acetic acid as eluent in the ratio of 85:13.5:1.5 and analytical techniques. The analytical analysis of the product formed showed 10-12% conversion of vegetable oil to fatty acid methyl ester (FAME) after 8 hours of reaction time.