El ciclo del nitrógeno en la vida terrestre

Nitrogen makes up 78 percent of our atmosphere but plants cannot use it directly. This is where bacteria

become heroes. Certain soil bacteria convert atmospheric nitrogen into ammonia through a process

called nitrogen fixation. Plants absorb this ammonia and transform it into proteins.

When animals eat these plants, nitrogen moves up the food chain. After organisms

die, decomposer bacteria break down their bodies and release nitrogen back into

the soil. Some bacteria even convert nitrogen back into gas, returning it to

the atmosphere. This endless loop ensures life on Earth continues thriving.

Without these microscopic workers, our planet would be lifeless.