This is what 3,134,000,000 looks like in scientific notation 3.134*
Urban area" can refer to towns, cities, and suburbs. An urban area includes the city itself, as well as the surrounding areas. Many urban areas are called metropolitan areas, or "greater," as in Greater New York or Greater London.
I’m not sure if this was the answer you were looking for but I hope this helps ✨
An example is forest floors. Naturally produces compost
Deciduous forest as it contains more nutrients in it.