THE
WORLD IS GETTING SMALLER BY THE DAY
7.5
billion People must survive on 8% of the Earth’s surface
Stes de Necker
Seen from space, the
majority of the Earth’s surface is covered by oceans – that
makes up 71% of the surface of the Earth, with the remaining 29% for land.
But what percentage of
the Earth’s land surface is desert?
Deserts actually make
up 33%, or 1/3rd of the land’s surface area.
A desert is
normally defined as a region that has a moisture deficit over the course of a
year. In other words, they receive less rainfall in a year than they give up
through evaporation.
This means that only 10% of the earth’s surface
is not covered in either sand or water.
Take away all uninhabitable land like mountain
ranges, marches, rivers etc. and we left with only about 8% of the earth’s
surface as acceptably habitable.
Currently the earth
must accommodate 7,500 billion people on 8% of its surface.
Surface Area of the Earth
Total
surface area of earth: 510,072,000 sq km
Total
water surface area: 70.8% (361,132,000 sq km)
Total
land surface area: 29.2% (148,940,000 sq km)
There
are a total of 5 oceans, and they are the Arctic, Pacific, Atlantic, Indian,
and the Antarctic Ocean. Out of these five, there are three major oceans, the
Atlantic, Pacific, and the Indian Ocean. They account for 90 percent of the
area covered by oceans.
Water
covers approximately 70 percent of our world's surface. Yet only 2.5 percent of
the Earth's water is fresh and thus suitable for consumption. Not only that,
but of that 2.5 percent, more than two-thirds is locked away in glaciers and
not particularly able to help meet the growing demands of society. By far, the
most abundant and available source of fresh water is underground water supplies
or wellsprings known as aquifers.
The
percentages of earth's land surface can be divided into different types: 20%
covered by snow land, 20% mountains, 20% dry land, 30% good land that can be
farmed, 10% land doesn't have topsoil.
World Earth Surface
Details Surface area Surface area %
Saltwater 352,103,700
km 69.03
Freshwater 9,028,300
km² 1.77
Good land that can be farmed 44,682,307
km² 8.76
Mountains 29,788,205
km² 5.84
Covered by snow land 29,788,205
km² 5.84
Dry land 29,788,205
km² 5.84
Land doesn't have topsoil 14,894,102
km² 2.92
The
total surface area of earth is 510,072,000 sq km and that must accommodate
7.5 billion people.
That
means that there are on average only 680 square meters of habitable land
available for every person on earth.
The
highest point on land is Mount Everest (8,848 metres or 29,029 ft) and the
deepest known part on ocean is The Mariana Trench (11,034 metres or 36,200 ft).