The sun.
The Sun!
the sun
Sunlight is the main source of energy on earth
The Sun is the primary source of all energy on Earth.
We get most of our energy from the Sun.
The Sun!
the sun
The sun
The Sun is the ultimate source of all energy on earth.
The sun
Sun is the original source of energy that drives photosynthesis, climate, wind, almost everything on Earth.
The sun is what is the ultimate source of energy on Earth. Without it, all would die.
The Sun.
"geothermal" (the source is a combination of original impact energy and radioactive decay.)
The original source of energy for hydroelectricity is water.
The original source of energy for hydroelectricity is water.
The primary is the sun