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.
In addition to causing water erosion and pollution, surface runoff in urban areas is a primary cause of urban flooding which can result in property damage, damp and mold in basements, and street flooding.urface runoff can be generated either by rainfall,snowfall or by the melting of snow, or glaciers. Snow and glacier melt occur only in areas cold enough for these to form permanently.