{"id":3349,"date":"2014-12-04T11:15:45","date_gmt":"2014-12-04T11:15:45","guid":{"rendered":"http:\/\/www.123fakta.com\/da\/?p=3349"},"modified":"2026-03-19T10:38:22","modified_gmt":"2026-03-19T10:38:22","slug":"fakta-om-vand","status":"publish","type":"post","link":"https:\/\/www.123fakta.com\/da\/facts-about-water","title":{"rendered":"Fakta om vand og drikkevand"},"content":{"rendered":"<ol>\n<li><strong>V\u00e6gtforskel:<\/strong>\u00a0Varmt vand er tungere end koldt vand<\/li>\n<li><strong>Middelalderen:<\/strong>\u00a0I middelalderen drak folk mere \u00f8l end vand, fordi de fleste vandkilder var forurenede. \u00d8l havde dog et lavere alkoholindhold end nutidens \u00f8l. M\u00e6lk var det eneste alkoholfrie alternativ til vand.<\/li>\n<li><strong>Produktion:<\/strong>\u00a0Det kr\u00e6ver 170 liter vand at lave \u00bd liter \u00f8l. Det kr\u00e6ver 2.720 liter vand at fremstille en bomulds-T-shirt (svarende til en gennemsnitlig persons vandforbrug over 3 \u00e5r).<\/li>\n<li class=\"no-mobile\"><strong>Kleopatra:<\/strong>\u00a0Det vand, du drikker i dag, indeholder molekyler, som ogs\u00e5 blev drukket af <a href=\"https:\/\/www.123fakta.com\/da\/fakta-om-dinosaurer\/\">Dinosaurer<\/a>, gamle mennesker osv. If\u00f8lge en matematisk teori er der 100% sandsynlighed for, at der i et glas vand er et molekyle, som Kleopatra ogs\u00e5 drak.<\/li>\n<li><strong>Farve:<\/strong>\u00a0Vands naturlige farve er lysebl\u00e5 (turkis), hvilket skyldes det menneskelige \u00f8jes d\u00e5rlige absorption af den r\u00f8de farve i det synlige spektrum. I sm\u00e5 m\u00e6ngder ser vand farvel\u00f8st ud for os (som et glas vand).<\/li>\n<li><strong>Mpemba-effekten:<\/strong>\u00a0Under visse omst\u00e6ndigheder kan varmt vand fryse hurtigere end koldt vand.<\/li>\n<li><strong>Forbrug:<\/strong>\u00a02\/3 af vandet i en gennemsnitlig husholdning forbruges p\u00e5 badev\u00e6relset.<\/li>\n<li><strong>Toilet:<\/strong>\u00a0Et gennemsnitligt toilet bruger 6 liter rent drikkevand p\u00e5 et enkelt skyl.<\/li>\n<li><strong>Elektrisk leder:<\/strong>\u00a0Vand i sig selv er ikke en s\u00e6rlig god elektrisk leder, men urenheder i vand er det.<\/li>\n<li><strong>Swimmingpool:<\/strong>\u00a0En gennemsnitlig swimmingpool udleder omkring 3.785 liter om m\u00e5neden p\u00e5 grund af fordampning og andre \u00e5rsager.<\/li>\n<\/ol>\n<figure id=\"attachment_7250\" aria-describedby=\"caption-attachment-7250\" style=\"width: 1014px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-7250 size-large\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/vandet-universet-2-1024x768.jpg\" alt=\"Fakta: Der findes et sort hul i universet, som indeholder 140 billioner gange mere vand end alle verdenshavene.\" width=\"1024\" height=\"768\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/vandet-universet-2-1024x768.jpg 1024w, https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/vandet-universet-2-300x225.jpg 300w, https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/vandet-universet-2-768x576.jpg 768w, https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/vandet-universet-2-16x12.jpg 16w, https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/vandet-universet-2.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption id=\"caption-attachment-7250\" class=\"wp-caption-text\">Tilskrivning: NASA\/ESA<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>I rummet er der et sort hul, som indeholder 140 billioner gange s\u00e5 meget vand som alle Jordens oceaner tilsammen. Alt vandet i det sorte hul er vanddamp.<\/strong><\/em><\/p>\n<h2>Vand p\u00e5 Jorden<\/h2>\n<ul>\n<li><strong>Lukket kredsl\u00f8b<\/strong>Alt vand p\u00e5 Jorden er i et lukket kredsl\u00f8b p\u00e5 planeten (en vandcyklus) - s\u00e5 fra livets begyndelse til nu har der v\u00e6ret en konstant m\u00e6ngde vand p\u00e5 Jorden.<\/li>\n<li><strong>Temperaturer<\/strong>: Vand regulerer Jordens temperatur<\/li>\n<li><strong>Ferskvand<\/strong>: 3% af Jordens vand er ferskvand, og 31% af det ferskvand er tilg\u00e6ngeligt for mennesker.<\/li>\n<li><strong>Grundvand<\/strong>For hver liter ferskvand p\u00e5 jordens overflade er der 30 liter under jorden (s\u00e5kaldt 'grundvand').<\/li>\n<li><strong>Er<\/strong>: 90% af ferskvandet p\u00e5 jordens overflade er is p\u00e5 Sydpolen (Antarktis).<\/li>\n<li><strong>Bajkal-s\u00f8en<\/strong>: 20% af Jordens ikke-frosne ferskvand findes i Bajkals\u00f8en i Rusland<\/li>\n<li><strong>Mad og drikke<\/strong>: Menneskelig f\u00f8devareproduktion p\u00e5 Jorden kr\u00e6ver 200.000.000 liter vand pr. sekund.<\/li>\n<li><strong>Masse og volumen<\/strong>: Vand udg\u00f8r kun 0,07% af Jordens masse og 0,4% af Jordens volumen.<\/li>\n<li><strong>Former af vand<\/strong>Vand er den eneste kemiske forbindelse, der forekommer naturligt p\u00e5 Jorden i tre former: flydende, gas og fast (vand, damp og is).<\/li>\n<\/ul>\n<h2>Vand og den menneskelige krop<\/h2>\n<ul>\n<li><strong>Indtagelse af vand<\/strong>Det generelt anbefalede vandindtag pr. dag er 3 liter for m\u00e6nd og 2,2 liter for kvinder. Vores individuelle v\u00e6skebehov afh\u00e6nger dog af flere interne faktorer (v\u00e6gt, alder, genetik osv.) og eksterne faktorer (vejr, temperatur, milj\u00f8 osv.) samt fysisk aktivitet.<\/li>\n<li><strong>Vand i kroppen<\/strong>Et voksent menneske best\u00e5r af 50 - 65% vand. En nyf\u00f8dt baby best\u00e5r af 75% vand.<\/li>\n<li><strong>Bones<\/strong>: Knoglerne i menneskekroppen best\u00e5r af 31% vand.<\/li>\n<li><strong>Hjernen<\/strong>: Hjernen best\u00e5r af 85% vand<\/li>\n<li><strong>Musklerne<\/strong>: Muskler og nyrer indeholder 79% vand<\/li>\n<li><strong>Lunger<\/strong>: Lungerne best\u00e5r af 83% vand.<\/li>\n<li><strong>Hud<\/strong>: Huden indeholder 64% vand<\/li>\n<li><strong>V\u00e6sketab<\/strong>Under h\u00e5rd fysisk aktivitet (f.eks. tr\u00e6ning) og is\u00e6r i varmt vejr mister kroppen flere liter vand. Derfor vejer man typisk mindre efter aktiviteten.<\/li>\n<\/ul>\n<h2>Fakta om vandforgiftning<\/h2>\n<ul>\n<li><strong>\u00c5rsag<\/strong>: Hvis man drikker mere vand, end kroppen kan udskille gennem sved og urin, kan det f\u00f8re til vandforgiftning. Det skyldes, at store m\u00e6ngder vand reducerer saltkoncentrationen i blodet.<\/li>\n<li><strong>Symptomer og symptomer<\/strong>Symptomerne vil i de fleste tilf\u00e6lde v\u00e6re mild svimmelhed og utilpashed, men der er eksempler p\u00e5 mennesker, der er g\u00e5et i koma og endda er d\u00f8de af vandforgiftning.<\/li>\n<li><strong>Vandm\u00e6ngde<\/strong>Der er ingen defineret gr\u00e6nse for, hvor meget vand der skal til for at f\u00e5 vandforgiftning, men 3 liter kan v\u00e6re nok i tilf\u00e6lde, hvor man 1) drikker vandet hurtigt, 2) ikke indtager nok salt og 3) ikke udskiller vandet hurtigt nok.<\/li>\n<li><strong>Forebyggelse<\/strong>: S\u00e5 l\u00e6nge du s\u00f8rger for at spise en normal saltrig kost og drikke vand i passende m\u00e6ngder, har du normalt ingen (eller meget lille) risiko for at blive vandforgiftet.<\/li>\n<\/ul>\n<h2>Verdens problemer med drikkevand<\/h2>\n<ul>\n<li><strong>D\u00f8ds\u00e5rsag<\/strong>: 3,4 millioner mennesker d\u00f8r hvert \u00e5r af vandrelaterede \u00e5rsager (hovedsageligt p\u00e5 grund af forurenet drikkevand og manglende adgang til vand). 99% af alle ofre er mennesker i udviklingslande.<\/li>\n<li><strong>Kina<\/strong>: Omkring 700 millioner kinesere drikker forurenet drikkevand<\/li>\n<li><strong>Forskel i forbrug<\/strong>Et brusebad p\u00e5 5 minutter kr\u00e6ver mere vand, end en gennemsnitlig person i et slumkvarter i et udviklingsland bruger p\u00e5 en hel dag.<\/li>\n<\/ul>\n<figure id=\"attachment_7251\" aria-describedby=\"caption-attachment-7251\" style=\"width: 690px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-7251 size-full\" src=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/vand-fakta-2.jpg\" alt=\"Fakta: Det er vores syn, der giver vand dets bl\u00e5lige farve.\" width=\"700\" height=\"464\" srcset=\"https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/vand-fakta-2.jpg 700w, https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/vand-fakta-2-300x199.jpg 300w, https:\/\/www.123fakta.com\/wp-content\/uploads\/2014\/12\/vand-fakta-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><figcaption id=\"caption-attachment-7251\" class=\"wp-caption-text\">Navngivelse: Pixabay.com<\/figcaption><\/figure>\n<p style=\"text-align: center;\"><em><strong>Fakta: Vand ser lysebl\u00e5t ud for det menneskelige \u00f8je, fordi vi har en lav absorption af den r\u00f8de farve i vores synlige spektrum.<\/strong><\/em><\/p>","protected":false},"excerpt":{"rendered":"<p>V\u00e6gtforskel: Varmt vand er tungere end koldt vand Middelalderen: I middelalderen drak folk mere \u00f8l end vand, fordi de fleste vandkilder var forurenede. \u00d8l havde dog et lavere alkoholindhold end nutidens \u00f8l. M\u00e6lk var det eneste alkoholfrie alternativ til vand Produktion: Det kr\u00e6ver 170 liter vand at lave \u00bd liter \u00f8l. For at lave ... <a title=\"Fakta om vand og drikkevand\" class=\"read-more\" href=\"https:\/\/www.123fakta.com\/da\/facts-about-water\" aria-label=\"L\u00e6s mere om fakta om vand og drikkevand\">L\u00e6s Mere<\/a><\/p>","protected":false},"author":1,"featured_media":7253,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"cybocfi_hide_featured_image":"","footnotes":""},"categories":[66],"tags":[120],"class_list":["post-3349","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-miscellaneous","tag-adsense"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Facts about water and drinking water - 25 interesting facts<\/title>\n<meta name=\"description\" content=\"Fact: Water you drink today contains molecules that have been drunk by dinosaurs. 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