https://www.bbc.co.uk/news/world-australia-53549936https://en.wikipedia.org/wiki/2019–20_Australian_bushfire_season
https://www.sciencedirect.com/science/article/abs/pii/S009917671100002Xhttps://www.worldvision.org/disaster-relief-news-stories/2005-hurricane-katrina-factshttp://www.hurricanescience.org/history/studies/katrinacase/impacts/
https://en.wikipedia.org/wiki/September_11_attacks
https://eu.usatoday.com/story/money/2020/09/06/the-worlds-most-important-event-every-year-since-1920/113604790/ https://www.census.gov/history/pdf/pearl-harbor-fact-sheet-1.pdf
https://www.weather.gov/ilx/july1936heat
"https://www.ducksters.com/history/us_1900s/great_depression.php
https://www.digitalhistory.uh.edu/disp_textbook.cfm?smtID=2&psid=3434"
https://en.wikipedia.org/wiki/1979_Machchhu_dam_failure
https://www.japantimes.co.jp/news/2020/03/07/national/missing-japan-3-11-disasters/
https://en.wikipedia.org/wiki/Chernobyl_disaster
https://eu.usatoday.com/story/money/2020/09/06/the-worlds-most-important-event-every-year-since-1920/113604790/https://www.britannica.com/event/Bhopal-disaster
https://www.bbc.com/news/world-asia-45423575
https://en.wikipedia.org/wiki/2008_Sichuan_earthquake
https://www.historyextra.com/period/victorian/11-shocking-moments-in-history/
https://eu.usatoday.com/story/money/2020/09/06/the-worlds-most-important-event-every-year-since-1920/113604790/
"https://watson.brown.edu/costsofwar/costs/human/civilians/afghan
https://en.wikipedia.org/wiki/United_States_military_casualties_in_the_War_in_Afghanistan"
https://economictimes.indiatimes.com/nation-world/worlds-worst-natural-disasters-in-the-past-100-years/huang-he-floods/slideshow/20837619.cms
https://en.wikipedia.org/wiki/Typhoon_Nina_(1975)
https://economictimes.indiatimes.com/nation-world/worlds-worst-natural-disasters-in-the-past-100-years/huang-he-floods/slideshow/20837619.cms
https://en.wikipedia.org/wiki/Banqiao_Dam#1975_Banqiao_Dam_failure
https://link.springer.com/referenceworkentry/10.1007%2F978-1-4020-4399-4_47
https://steemit.com/history/@zam398/tragic-brutal-and-horrible-events-in-history-that-changed-the-world
http://www.londoni.co/index.php/25-history-of-bangladesh/1970-bhola-cyclone/314-bhola-cyclone-1970-half-a-million-die-history-of-bangladesh
https://www.worldvision.org/refugees-news-stories/syrian-refugee-crisis-facts
https://pt.wikipedia.org/wiki/Genoc%C3%ADdio_em_Ruanda
https://economictimes.indiatimes.com/nation-world/worlds-worst-natural-disasters-in-the-past-100-years/huang-he-floods/slideshow/20837619.cms
https://en.wikipedia.org/wiki/Great_Purge
https://en.wikipedia.org/wiki/Gulaghttps://www.history.com/topics/russia/gulag
https://steemit.com/history/@zam398/tragic-brutal-and-horrible-events-in-history-that-changed-the-world
https://economictimes.indiatimes.com/news/politics-and-nation/bengal-famine-of-1943-caused-by-british-policy-failure-not-drought-study/articleshow/68495710.cms?from=mdr
"https://www.uswings.com/about-us-wings/vietnam-war-facts/
https://www.britannica.com/event/Vietnam-War
https://www.history.com/topics/vietnam-war/vietnam-war-history"
https://en.wikipedia.org/wiki/1971_Bangladesh_genocide
https://economictimes.indiatimes.com/nation-world/worlds-worst-natural-disasters-in-the-past-100-years/huang-he-floods/slideshow/20837619.cms
https://en.wikipedia.org/wiki/List_of_wars_and_anthropogenic_disasters_by_death_toll
https://en.wikipedia.org/wiki/Russian_famine_of_1921%E2%80%9322
https://www.history.com/topics/korea/korean-war

https://www.guinnessworldrecords.com/world-records/highest-death-toll-from-a-civil-war
https://www.quora.com/How-many-people-died-during-the-Cold-War
https://en.wikipedia.org/wiki/List_of_wars_and_anthropogenic_disasters_by_death_toll
https://en.wikipedia.org/wiki/Holocaust_victims
https://www.nsf.gov/news/speeches/colwell/rc02_natlsecmtg/tsld001.htm
http://www.centre-robert-schuman.org/userfiles/files/REPERES%20%E2%80%93%20module%201-1-1%20-%20explanatory%20notes%20%E2%80%93%20World%20War%20I%20casualties%20%E2%80%93%20EN.pdf
https://listverse.com/2012/03/02/top-10-worst-moments-in-human-history/
https://courses.lumenlearning.com/suny-hccc-worldhistory2/chapter/casualties-of-world-war-ii/
https://www.healthline.com/health/1918-flu-pandemic-facts