Though fracking is used worldwide to extract gas and oil, a fracking boom has occurred recently in the United States, partly driven by concerns over energy security and the costs associated with imported oil and other fossil fuels.
Early history. The Viennese Waltz, so called to distinguish it from the Waltz and the French Waltz, is the oldest of the current ballroom dances. It emerged in the second half of the 18th century from the German dance and the LÃ¤ndler in Austria and was both popular and subject to criticism.
Polka in the United States. Polka in the United States refers to polkaâa music and dance style that originated in Europe in the 1830s and came to American society when people immigrated from Eastern Europe. A fast style in 2/4 time, and often associated with the preâWorld War II era, polka remains a dynamic niche music in America.