Sigma Sagittarii is the second brightest star in the constellation Sagittarius. It is a hydrogen fusing dwarf star that belongs to the spectral type B2.5 V. It has an apparent visual magnitude of 2.1. The star has a luminosity 3,300 times that of the Sun and about seven solar masses.
Urban sprawl is endangering wildlife all over america and it needs to stop. The second major negative effect from urban sprawl is increased air pollution. With sprawl comes longer and more frequent car rides into the city. This is a major concern because of the amount of pollution produced by so many people driving so far, so frequently.
View of suburban development in the Phoenix metropolitan area. Urban sprawl or suburban sprawl describes the expansion of human populations away from central urban areas into low-density, monofunctional and usually car-dependent communities, in a process called suburbanization. In addition to describing a particular form of urbanization, the term also relates to the social and environmental consequences associated with this development. In Continental Europe the term peri-urbanisation is often used to denote similar dynamics and phenomena, although the te