INTRODUCTION

         The two greatest issues that humanity faces in this century are energy access and climate change. The rapidly growing population and rising income have resulted in a tremendous increase in energy demand. Human civilization is mostly based on the use of energy, which plays a significant role in socioeconomic growth through raising living standards. Every country's economic development depends on energy. Energy is required in every sector of the economy, including agriculture, industrial, transportation, commerce, and home sectors.

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       Because of the widespread use of fossil fuels, the high energy demand in the industrialised world, as well as in the residential sector, has resulted in environmental contamination. Fossil fuel consumption has a number of public health and environmental dangers, as well as having widespread and potentially irreversible effects on global warming. As a result, environmental concerns have grown, prompting researchers to look into alternative energy sources. Wind power, hydropower, solar power, biomass, and biofuels are all examples of renewable energy. Because of economic and environmental considerations, all of these resources must contribute, and biodiesel could be one of the solutions.

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              WCO's biodiesel manufacturing is environmentally friendly because it recycles used cooking oil and produces renewable energy with less pollution. It reduces the cost of waste management while also substituting for some petrochemical oil imports. Economic, environmental, and waste management solutions are all available for biodiesel manufacturing from used cooking oil.