E biogas gives twice as much heat as natural gas. Hydrogen has higher energy by mass than jet fuel but it has lower energy by volume. 2 Take a sneak peak at the movies coming out this week 812 why your new years resolution should be to go to the movies more. Biomass energy advantages and disadvantages bbc bitesize . State the advantages and disadvantages of external fertilization. For example a bar representing 1 tree will be largest as it has more mass than primary consumers. Cloning is the process of creating a copy of a single cell or an entire living organism. If people do not replant biomass feedstocks as fast as they use them biomass energy becomes a non renewable energy source. Biomass is the burning of by products from forestry plants and animal waste from farms to generate energy. Each energy resource has its advantages and disadvantages. Advantages of biomass a an inexhaustible source of energy. This