The energy source may be natural gas, electricity, coal, wood, oil, propane and/or kerosene, or any other energy supplier.
(The energy source; may be; natural gas, electricity, coal, wood, oil, propane and/or kerosene, or any other energy supplier)
The energy source
may be
natural gas, electricity, coal, wood, oil, propane and/or kerosene, or any other energy supplier