Check About This Mac. From the Apple ( ) menu in the corner of your screen, choose About This Mac. The version of your operating system appears beneath âmacOSâ or âOS Xâ in the window that opens. If you need to know the build, click the version. This example shows macOS High Sierra version 10.13, build 17A365:
Biomass is fuel that is developed from organic materials, a renewable and sustainable source of energy used to create electricity or other forms of power. Some examples of materials that make up biomass fuels are: 1  scrap lumber; 2  forest debris;
Biomass is any organic matter that can be used as an energy source. Wood, crops, and yard and animal waste are examples of biomass.People have used biomass longer than any other energy source. For thousands of years, people have burned wood to heat their homes and cook their food.Biomass gets its energy from the sun.ethane is a good energy source. We can burn it to produce heat or to generate electricity.In some landfills, wells are drilled into the piles of garbage to capture methane produced from the decaying waste. The methane can be purified and used as an energy source, just like natural gas.