How much ( percentage)  of the earths land is occupied by civilization?
544753
it's really interesting.. the 12% answer is correct as a close approximation.\nThe interesting thing to note is that we are supposed to be causing globabl warming. This figure puts makind really into a good global perspective.\nThe next thing to do is see how much smoke and gas volcanos and thermal springs pump into the world every year. \nThen add in all the gases caused by animal excrement (include human in the numbers), and all the plantlife on the planet (including photosynthesising plants and animals in the oceans) and you start to build a very good picture that mankind is not causing global warmnig.
321604
I haven't been able to find any exact numbers, but since you asked for fraction, it's about 1/3 or about 2 billion people.
678011
The major question in the book is \n"Do we need civilization, or is it better to 'go back to nature' and live as 'primitive' man?"
675326
Earth is about 3.6 billion years ,i dont know the rest.
297260
Earth is 12,742 kilometers (7,900 miles) in diameter.
407012
According to my friends at the CIA:\nagriculture: 9.3% \nindustry: 45.1% \nservices: 45.6% (2005 est.)
429588
earth is 5 490 383 247 360 000 square feet. (196 940 400 Sq miles)\n\n29.2% is land\n70.8% is water
828711
The better question is what percentage of land is desert, in which case it's something on the order of 4-9%.  Roughly.
15340
Earth has a surface area of 196,940,400 square miles, slightly less than a perfect ball with a diameter of 7913.5 miles The surface area of the seven continents and all the islands of the world is about 57 million miles, while the total area of the six habitable continents (Antarctica excluded) is around 52 million square miles. \n\nThe human population on earth has crossed six billion. If we distribute all the exposed land evenly among all mankind, 133 people would have to share one square mile. What that means is that every single person on Earth, man woman and child would have close to five acres of land for his or her use. More precisely, each person would get 209,000 square feet of land, or a square plot of land 457 feet on each side. \n\nNot all this land can be used beneficially however. A significant portion of the Earth's exposed land is unhabitable or cannot be used for any agricultural purpose. Large portions lie in the far north. Large portions are extremely arid. Large portions are very mountainous. In sum, only about one fourth of all the land on earth, or somewhat more than 12 million square miles, is arable. \n\nToday, over half of the arable land in the world is in fact not under cultivation. Bringing the unused land into service in many cases would require huge investments of money and effort, and would do considerable damage to the environment. For example, only about 28% of the arable land on the African continent is used for growing crops. Immense tracts of forests or jungles would have to be cleared to bring the rest of the arable land on that continent to productive use. \n\nThus, only about one eighth of each imaginary plot of land distributed to each person is land which is under cultivation. In effect, each person has a piece of land about 26,000 square feet (a square 161 feet on each side or just a bit more than ½ an acre) at his or her disposal on which to grow all that he or she needs.
488001
It`s about 45-50 % !\nBut If you realy means world as the earth !\nMay be there are more trees on the other unknown live planets !\nYou know 50 % is the percentage of 1990 and i guess that now in 2006 it should be 45 % , and sadly i should say if this tree termination method continues 1n 2025 you only can find tree in the museums !\nTry to hold them !\nTry to grow the trees !\nThey are our fathers !
1089548
The earth is being destroyed by mankind. It won't be overpopulated but drained out by human mischieves. Our duty is to preserve peace and harmony. What a pity...the beautiful earth is a war-ridden ball.
400326
Russia, at a whopping 16,995,800 sq km, has the largest land mass of any nation in the world.  China is next, with 9,326,410 sq km, followed by the US at 9,161,923 sq km, then Canada with 9,093,507 sq km.
978261
This sounds like 5%'r or also called Nation of Gods and Earths ideology.\n\nhttp://www.inetmgrs.com/onepeoples/nation_of_gods_and_earths_http.htm
993258
The Earth was formed around 4.57 billion (4.57×109)[1] years ago
165445
there are 7241.00098723 earths. Period.
417467
WELL, there are 1,400,000,000 cubic kilometers of water total on the earth in all forms (ice, ground, surface, air, and soil), of which only about 3 percent is fresh water (two-thirds of which is frozen in glaciers and polar ice caps), which is 42,000,000 km3 total, or 13,860,000 km3 of liquid fresh water on earth.\n\nhey, i wonder how much of that is inside people.... :)
419052
Taking the present population of the earth as 6.5 billion, at 2 sq ft per person, we would require 13 billion sq ft.\n\nThis works out roughly to 1207 sq km.\n\nThe Isle of Wight being only 381 sq. km., it would be a tad too small.\n\nGoogling for 1207 sq. km. gets me the city of Los Angeles, or the island of Lifou, in New Caledonia!