Earth has approximately 6,803,000,000 human inhabitants as of December 12, 2009. Projections indicate that the will reach seven billion in 2013 and 9.2 billion in 2050 Most of the growth is expected to take place in. Human varies widely around the world, but a majority live in. By 2020, 60% of the world's population is expected to be living in urban, rather than rural, areas.
It is estimated that only one-eighth of the surface of the Earth is suitable for humans to live on—three-quarters is covered by oceans, and half of the land area is either desert (14% high mountains (27%),or other less suitable terrain. The northernmost permanent settlement in the world is on in Canada. 82°28′N) The southernmost is the in Antarctica, almost exactly at the South Pole. (90°S)
The study and practice of map making, and vicariously, have historically been the disciplines devoted to depicting the Earth. the determination of locations and distances, and to a lesser extent the determination of position and direction, have developed alongside cartography and geography, providing and suitably quantifying the requisite information.
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