And in the year 2010 is estimated, it was found that most of the world population lived in urban areas than rural areas. As a result, the big city has become a source of spores and spread germs easily.
And in 2010, the assessment found that the majority of the world's population live in urban areas than rural. The city became a hotbed and spread germs easily.
And in 2010 have showed that the majority of the world population living in urban areas than rural areas. Due to the big city to become a hotbed of disease spread and easy.