The sun
Ultimately, most energy used on Earth comes from the radiation we receive from the Sun.
The Earth system is powered by energy from two major sources: the Sun and the planet's internal heat.
It would utilize renewable energy sources and create less pollution
Sunlight is the main source of energy on earth
The Sun is the primary source of all energy on Earth.
The sun is the ultimate source of energy for almost all earth ecosystems.
The sun is what is the ultimate source of energy on Earth. Without it, all would die.
the sun.
the sun
The sun
the sun.
The sun is the ultimate source of all energy in Earth's ecosystems.
solar energy
Basically, the ultimate source of energy for anything on earth can be considered solar energy. Moreover, on a wider outlook, the ultimate source of energy for the stars, galaxies and all could be the big bang which formed matter in this universe
The Sun is the ultimate source of all useable energy on Earth.
The Sun is the ultimate source of all useable energy on Earth.
The Sun is the ultimate source of all useable energy on Earth.