The Sun!
We get most of our energy from the Sun.
Ground Water!
the sun
Sunlight
Ultimately, most energy used on Earth comes from the radiation we receive from the Sun.
The sun is the main source of energy on earth.
water and electricity
We get most of our energy from sunlight.
We get most of our energy from the Sun.
the sun
The sun, or plants
carbon
The sun.
On Earth, the greatest source of thermal energy would be at the earth's core.
The sun
Sunlight
The sun