Oil
The original source of energy for this heating system is electricity or natural gas. Electric heating systems convert electrical energy into heat, while gas heating systems burn natural gas to produce heat.
The original source of energy for hydroelectricity is water.
The original source of energy for hydroelectricity is water.
The original source of the energy in any combustible plant material is from the sun.
Oil
The original source of energy for hydroelectricity is the gravitational potential energy of water stored in dams or reservoirs. When this water is released and flows through turbines, it generates mechanical energy, which is then converted into electrical energy.
the bio gas that the algae produce is the energy source.
Natural gas is a nonrenewable energy source.
carbon
Assuming you mean the source of energy, the original source of all energy for life on this planet is the sun.
The original source of energy in the biosphere is sunlight. Plants and other photosynthetic organisms convert sunlight into chemical energy through the process of photosynthesis, which is then used by living organisms as a source of energy.
gas could be a part of kinetic energy or potential energy