delÂ·eÂ·teÂ·riÂ·ous. adj. Having a harmful effect; injurious: the deleterious effects of smoking.
Portage is a city in Kalamazoo County in the U.S. state of Michigan. The population was 46,292 in the 2010 census. It is the smaller of the two main cities included in the Kalamazoo-Portage Metropolitan Statistical Area, which has a population of 326,589 as of 2010. Portage is adjacent to the southern boundary of the City of Kalamazoo.
Byron Center is an unincorporated community in Kent County in the U.S. state of Michigan It is a census-designated place (CDP) used for statistical purposes. The population was 3,777 at the 2000 census. The community is at the center of Byron Township, about 14 miles (23 km) south-southwest of Grand Rapids.