In the United States, the Bureau of Labor Statistics computes the consumer price index which is used to find inflation rates. The bureau states that the consumer price index âis a measure of the average change over time in the prices paid by urban consumers for a market basket of consumer goods and services.â.
The earth ulis called a blue planet because of the presence of abundance of water in it. About 70 percent of the earth's crust is covered with water. And this imparts it with a blue colour as seen from the space.
The reason why the phenomenon is known as a blue moon is not certain, although according to one explanation the term means betrayer moon (belewe in Old English). On other occasions the moon can actually take on a blue colouring but these are the result of ash spewed into the sky by volcanoes.