The answer: the carbon cycle and nitrogen cycle
As energy and matter flow through an ecosystem, matter must be recycled and reused. Substances such as water, carbon, nitrogen, calcium, and phosphorus each pass between the living and nonliving worlds through biogeochemical cycles.
because we have only a limited amount of matter on earth
Energy must be transformed within ecosystems so that it is made available to other organisms. Energy is produced by producing organisms at the lowest trophic level, and then moves up to higher trophic levels to other consuming organisms.
Some expensive or rare mineral salts must be recycled.
Mainly, in supernova explosions, part of the matter is blown into space, where it can eventually become part of other star systems, that form later. Please note that only PART of the star matter is recycled. Most stars leave a remainder - a white dwarf, a neutron star, or a black hole. This is part of a more general rule (the Second Law of Thermodynamics), according to which there must needs be irreversible changes in the Universe, over time.
As energy and matter flow through an ecosystem, matter must be recycled and reused. Substances such as water, carbon, nitrogen, calcium, and phosphorus each pass between the living and nonliving worlds through biogeochemical cycles.
because we have only a limited amount of matter on earth
Energy must be transformed within ecosystems so that it is made available to other organisms. Energy is produced by producing organisms at the lowest trophic level, and then moves up to higher trophic levels to other consuming organisms.
Yes, iridium can be recycled and must be recycled because is very rare and expensive.
Some expensive or rare mineral salts must be recycled.
Mercury (as metal) can and must be recycled.
Light is able to move through matter, but it doesn't need matterin order to move from one place to another.
Mainly, in supernova explosions, part of the matter is blown into space, where it can eventually become part of other star systems, that form later. Please note that only PART of the star matter is recycled. Most stars leave a remainder - a white dwarf, a neutron star, or a black hole. This is part of a more general rule (the Second Law of Thermodynamics), according to which there must needs be irreversible changes in the Universe, over time.
Yes, and they must be recycled.
energy
energy
energy