The electromagnetic waves were called Hertzian and, later, radio waves.
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The Tang Dynasty was considered a golden age for art and literature in Chinese history. Two of China's greatest poets, Li Bai and Du Fu, hail from the Tang era.
Woodblock printing, one of the most common ways to print books and other texts, originated during the Han dynasty but further developed during the Tang dynasty.
Buddhism also gained major influence, but later decreased due to being prohibited by the state.
Coal workers' pneumoconiosis (CWP), commonly known as "black lung disease," occurs when coal dust is inhaled. Over time, continued exposure to the coal dust causes scarring in the lungs, impairing your ability to breathe.
Answer: The arable land that is not taken up for cultivation is call culturable waste land. (The land once use for cultivation but was unploughed for five years also fell in the same classification.) Such land may either fallow or overturned with shrubs and weeds.
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