Chelsea holds a B.F.A. from the Maryland Institute, College of Art (2005) and an M.A.T. from Johns Hopkins University (2011.) In addition to cartooning and being a first-time mother, she has worked as an elementary school art teacher.
The concept of primary energy is used in energy statistics in the compilation of energy balances, as well as in the field of energetics. In energetics, a primary energy source refers to the energy forms required by the energy sector to generate the supply of energy carriers used by human society.
Sources of Energy. We use many different energy sources to do work. Energy sources are classified as renewable or nonrenewable. Renewable and nonrenewable energy can be converted into secondary energy sources such as electricity and hydrogen. In the United States, most of our energy comes from nonrenewable energy sources.