up your noise
It usually comes from the sun.
the sun
By plants
Algae
We have ecosystems to live. Ecosystems give us energy,oxygen and many other things. Earth is the only planet which have ecosystems.
At the base of nearly every ecosystem on Earth is the energy from sunlight. There are rare examples in the abyssal plains/trenches where chemosynthesis takes place due to internal heat and exhaust from the asthenosphere/magma layer. However, since most ecosystems include photosynthetic plants, the energy from sunlight forms the basis for most energy in the system.
The sun Added: This is definitely true. Sunlight affects all surface and shallow water ecosystems. All though the sun provides us with a primary source of energy for almost all of earth's ecosystems, with proof of greenery from photosynthesis; this is not the case in such areas like the land of the Sahara desert and the Southwest climates of the USA. The lack of abundant water is another factor.
By plants
the sun
Solar energy.
Algae
The Sun
The main fate of energy is for it to be lost as heat.
The Sun
producers
The energy first comes from the sunlight, then the producers (green plants) absorb the energy. Sunlight
We concentrate on glucose breakdown, since it dominates energy production in most animal cells.
The most important source off all is WATER!
The sun is the ultimate source of energy for almost all earth ecosystems.