Based on natureEdit. An account may be classified as real, personal or as a nominal account. Example: A sales account is opened for recording the sales of goods or services and at the end of the financial period the total sales are transferred to the revenue statement account (Profit and Loss Account or Income and Expenditure Account).
A biofuel is a gas, liquid, or solid from natural sources such as plants that is used as a fuel. Biofuels can be mixed with conventional fuels. COBUILD Advanced English Dictionary.
Biofuels are just fuels which are grown using plant sources (sometimes called biomass) such as hemp, soya, oil seed rape, sugar and palm oil. These fuels can be in a solid, liquid or gaseous state.