Spheroidal carbonaceous particles are a component of fly-ash, which are released into the atmosphere along with the gases emitted from industries.
These particles are industrial byproducts that result from the high-temperature combustion of coal and fuel-oils.
These particles are a clear environmental indicator of industrialization as there is no other anthropogenic or natural source of their origin other than fossil fuel combustion.
Spheroidal carbonaceous particles have been identified for the first time in the Antarctic ice core, which have been present in the ice since 1936.