The Ten Essential Public Health Services describe the public health activities that should be undertaken in all communities and were developed as a companion to the three core public health functions.
Live rock is rock from the ocean that has been introduced into a saltwater aquarium. Along with live sand, it confers to the closed marine system multiple benefits desired by the saltwater aquarium hobbyist.ase rock, or dry rock, is a generic term for aragonite rock that has no organisms growing in or on the rock. Base rock is often used as filler rock in the aquarium as it is much cheaper to purchase than live rock. In time, base rock will become colonized by living organisms.
Rock festival. A rock festival, often considered synonymous with pop festival, is a large-scale rock music concert, featuring multiple acts performing an often diverse range of popular music including rock, pop, folk, electronic, and related genres. As originally conceived in the mid to late 1960s, rock festivals were held outdoors, often in open rural areas or open-air sports arenas, fairgrounds and parks, typically lasted two or more days, featured long rosters of musical performers, and attracted very large