Nuclear power, solar power.
producers sun
In general terms, there are two things we (mankind) can work on.1) Waste less energy. 2) Get access to new energy sources, and especially, to the so-called "renewable" energy sources, meaning, energy sources that will continue working for millions of years.
The two types of thermal energy sources are Geothermal and Thermal Energy
there are not just two electrical sources of energy there are lots but two could be solar and biomass
energy
Two sources of light energy include the sun and incandescent light bulbs.
The sun and the earth's interior are the two sources of energy that power earth's systems.
The sun and the earth's interior are the two sources of energy that power earth's systems.
The two main sources of energy gas and electricity.
Matter and energy
The sun and the earth's interior are the two sources of energy that power earth's systems.
core, and the Sun.