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Population density (people per km 2) by country. This is a list of countries and dependencies ranked by population density, sorted by inhabitants per square kilometre or square mile. The list includes sovereign states and self-governing dependent territories based upon the ISO standard ISO 3166-1.
The hydrosphere (from Ancient Greek ὕδωρ (húdōr) 'water' and σφαῖρα (sphaîra) 'sphere') [1] [2] is the combined mass of water found on, under, and above the surface of a planet, minor planet, or natural satellite. Although Earth's hydrosphere has been around for about 4 billion years, [3] [4] it continues to
This is a list of countries and other inhabited territories of the world by total population, based on estimates published by the United Nations in the 2024 revision of World Population Prospects. It presents population estimates from 1950 to the present. [2]
The world population more than tripled during the 20th century from about 1.65 billion in 1900 to 5.97 billion in 1999. [15] [16] [17] It reached the 2 billion mark in 1927, the 3 billion mark in 1960, 4 billion in 1974, and 5 billion in 1987. [18] The overall population of the world is approximately 8 billion as of November 2022.
For statistical convenience, the population of continental landmasses also include the population of their associated islands. World population by continent , 2021 Asia (59.4%)
Around 9.3% of the world population live in extreme poverty, subsisting on less than US$1.9 per day; [78] around 8.9% are malnourished. [79] 87% of the world's over-15s are considered literate. [80] As of January 2024, there were about 5 billion global Internet users, constituting 66% of the world population. [81]
Cartogram of the world's population in 2018; each square represents 500,000 people. This is a list of countries and dependencies by population.It includes sovereign states, inhabited dependent territories and, in some cases, constituent countries of sovereign states, with inclusion within the list being primarily based on the ISO standard ISO 3166-1.
They are the atmosphere, the hydrosphere, the cryosphere, the lithosphere and the biosphere. [28]: 1451 Earth's climate system is a complex system with five interacting components: the atmosphere (air), the hydrosphere (water), the cryosphere (ice and permafrost), the lithosphere (earth's upper rocky layer) and the biosphere (living things).