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12.8% of the population were under the age of 18, 20.6% from 18 to 24, 18.6% from 25 to 44, 20.3% from 45 to 64, and 27.6% who were 65 years of age or older. The median age was 42.2 years. For every 100 females, the population had 104.7 males. For every 100 females ages 18 and older there were 107.4 males. [22]
An improved water source, as defined by the World Health Organization (WHO), refers to a drinking water source that provides adequate and safe water for human consumption. Examples of improved water sources include piped water connections, protected wells, boreholes with hand pumps, packaged or delivered water and rainwater collection systems ...
Georgian Prime Minister Irakli Kobakhidze on Thursday proposed a "reset" to mend relations with the United States, Interpress news agency reported, after Washington paused more than $95 million in ...
Fresh water makes up less than 3% of the world's water resources, and just 1% of that is readily available. Just 3% of it is extracted for human consumption. Agriculture uses roughly two thirds of all fresh water extracted from the environment. [1] [2] [3] Fresh water is a renewable and variable, but finite natural resource.
A study in 2007 found that more than 1.2 billion people live in areas of physical water scarcity. [20] This water scarcity relates to water available for food production, rather than for drinking water which is a much smaller amount. [3] [21] Some academics favour adding a third type which would be called ecological water scarcity. [19]
Water has a very high specific heat capacity of 4184 J/(kg·K) at 20 °C (4182 J/(kg·K) at 25 °C) —the second-highest among all the heteroatomic species (after ammonia), as well as a high heat of vaporization (40.65 kJ/mol or 2257 kJ/kg at the normal boiling point), both of which are a result of the extensive hydrogen bonding between its ...
China's fresh water resources include 2500 cubic kilometers of mean annual run-off in its rivers and 828.8 cubic kilometers of groundwater recharge.As pumping water draws water from nearby rivers, the total available resource is less than the sum of surface and groundwater, and this is only 2,821.4 cubic kilometers. 80% of these resources are in the South of China. [3]
An additional 5.0 × 10 20 kg of water is estimated to exist in ice, lakes, rivers, groundwater, and atmospheric water vapor. [20] A significant amount of water is also stored in Earth's crust, mantle, and core. Unlike molecular H 2 O that is found on the surface, water in the interior exists primarily in hydrated minerals or as trace amounts ...
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