Currently, planetary rings have been found around Saturn, Jupiter, Uranus and Neptune, and their presence is also possible near Rhea (Saturn's moon) and Pluto. The planets of the terrestrial group have no rings. Scenarios in which the Earth has or acquires a ring system are found in science fiction literature, films, and other works of art.
According to a specialist in planetary ring systems, the hypothetical system of rings around the Earth was unstable and could be destroyed within a short (astronomical scale) period. The main factors determining the instability of the ring are the tidal effect of the Moon and the Sun, which destroys the ring, as well as the solar wind, which sweeps the small components of the ring out of near-Earth space.
The creation of artificial rings around the Earth can be used as a way to change the climate. Thus, according to the project of one company, the creation of a stone ring in the equatorial orbit would reduce the flow of sunlight in the equatorial regions of the Earth and compensate for the impact of global warming. The cost of the project is estimated at 6 trillion to 200 trillion dollars in the case of creating a stone ring and 500 billion US dollars in the case of creating a ring of artificial Earth satellites. At the same time, it is noted that any attempts at global impact on the climate are dangerous, since there is no sufficient understanding of the processes of climate change, in particular, their stability.