The Biggest Ammonium Nitrate Explosions since 2000
This week, a massive explosion involving ammonium nitrate rocked the city of Beirut, sending shock waves through the media.
This recent tragedy is devastating, and unfortunately, it’s not the first time this dangerous chemical compound has caused widespread damage.
Today’s graphic outlines the biggest accidental ammonium nitrate explosions over the last 20 years.
A Brief Explanation of Ammonium Nitrate
Before getting into the details, first thing’s first—what is ammonium nitrate?
Ammonium nitrate is formed when ammonia gas is combined with liquid nitric acid. The chemical compound is widely used in agriculture as a fertilizer, but it’s also used in mining explosives. It’s highly combustible when combined with oils and other fuels, but not flammable on its own unless exposed to extremely high temperatures.
It’s actually relatively tough for a fire to cause an ammonium nitrate explosion—but that hasn’t stopped it from happening numerous times in the last few decades.
The Death Toll
Some explosions involving ammonium nitrate have been deadlier than others. Here’s a breakdown of the death toll from each blast:
*Note: death count in Beirut as of Aug 6, 2020. Casualty count expected to increase as more information comes available.
One of the deadliest explosions happened in Tianjin, China in 2015. A factory was storing flammable chemicals with ammonium nitrate, and because they weren’t being stored properly, one of the chemicals got too dry and caught fire. The blast killed 165 people and caused $1.1 billion dollars in damage.
In 2001, 14 years before the explosion in Tianjin, a factory exploded in Toulouse, France. The accident killed 30 people and injured 2,500. The power of the blast was equivalent to 20 to 40 tons of TNT, meaning that 40 to 80 tons of ammonium nitrate would have ignited.
In addition to factory explosions, there have been several transportation accidents involving ammonium nitrate. In 2007, a truck in Mexico blew up and killed over 57 people. Filled with explosives, the truck crashed into a pickup, caught fire, and detonated. The blast left a 60-foot long crater in its wake.
While there have been several ammonium nitrate accidents throughout history, the recent tragedy in Beirut is one of the largest accidental explosions ever recorded, with 157 deaths and 5,000 injuries and counting.
In terms of TNT equivalent, a measure used to gauge the impact of an explosion, it ranks in the top 10 of the largest accidental explosions in history:
Topping the list is yet another ammonium nitrate explosion, this time back in 1947.
Known to history as the Texas City Disaster, the port accident was one of the biggest non-nuclear explosions to occur in history. The explosion killed over 500 people and injured thousands. The impact from the blast was so intense, it created a 15-foot wave that crashed along the docks and caused flooding in the area.
A Resource With Trade-Offs
Despite being dangerous, ammonium nitrate is still a valuable resource. There’s been an increased demand for the chemical from North America’s agricultural sector, and because of this, ammonium nitrate’s market size is expected to see an increase of more than 3% by 2026.
Because of its increasing market size, it’s more important than ever for trade industries to enforce proper safety measures when storing and transporting ammonium nitrate. When safety regulations aren’t followed, accidents can happen—and as we saw this week, the aftermath can be devastating.
Ranked: America’s Best Universities
Evaluated on 19 different metrics, here’s the list of America’s best universities, led by 14 private schools.
Ranked: America’s Best Universities
The latest ranking of America’s best universities is here, perfectly timed for the approaching admissions season.
“Best” is of course subjective, and U.S. News and World Report has compiled 19 metrics on which they evaluated more than 400 national universities. Some of them include:
- Graduation rates & performance: A four-year rolling average of the proportion of each entering class earning a bachelor’s degree in six years or less. Performance is measured against predictions made by the publishers, and when beaten, the university gains a higher scoring.
- Peer assessment: A two-year weighted average of ratings from top academics—presidents, provosts and deans of admissions—on academic quality of peer institutions with which they are familiar.
- Financial resources: The average per student spend on instruction, research, student services and related educational expenditures in the 2021 fiscal year.
- Debt: A school’s average accumulated federal loan debt among borrowers only.
- Pell graduation rates & performance: the same calculation as stated above, but focused only on Pell Grant students, adjusted to give more credit to schools with larger Pell student proportions.
The website’s methodology section details how they sourced their data, the weights assigned to each metric, and their changes over the years.
From the hundreds assessed come the nearly 50 best universities that offer a variety of undergraduate majors, post-graduate programs, emphasize research, or award professional practice doctorates.
Which are the Best Universities in America?
At the top of the list, Princeton University is the best university in the country, known for its physics, economics, and international relations departments. Notably, it’s a rare Ivy league university that does not have a law, medical, or business school.
Here’s the full ranking of America’s best universities, along with annual tuition requirements.
|1||Princeton University||New Jersey||$59,710|
|7||Duke University||North Carolina||$66,172|
|9||Brown University||Rhode Island||$68,230|
|12||Columbia University||New York||$65,524|
|12||Cornell University||New York||$66,014|
|12||University of Chicago||Illinois||$65,619|
|18||Dartmouth College||New Hampshire||$65,511|
|20||University of Notre Dame||Indiana||$62,693|
Michigan, Ann Arbor
|22||Georgetown University||Washington, DC||$65,082|
|22||University of North|
Carolina at Chapel Hill
|North Carolina||$39,338 (out-state)
|24||Carnegie Mellon University||Pennsylvania||$63,829|
|24||University of Virginia||Virginia||$58,950 (out-state)
University, St. Louis
California, San Diego
|28||University of Florida||Florida||$28,658 (out-state)
|35||New York University||New York||$60,438|
|35||University of Illinois|
|New Jersey||$36,001 (out-state)
|40||University of Washington||Washington||$41,997 (out-state)
|43||The Ohio State University||Ohio||$36,722 (out-state)
|47||Texas A&M University||Texas||$40,607 (out-state)
|47||University of Georgia||Georgia||$30,220 (out-state)
|47||University of Rochester||New York||$64,384|
|47||Virginia Tech||Virginia||$36,090 (out-state)
|47||Wake Forest University||North Carolina||$64,758|
|53||Florida State University||Florida||$21,683 (out-state)
|53||William & Mary||Virginia||$48,841 (out-state)
MIT places second, and Harvard and Stanford tie for third. Yale rounds out the top five.
Private universities, including seven Ivy League colleges, dominate the top of the rankings. Meanwhile, the highest-ranked public schools are tied at 15th, both state schools in California.
For affordability, since the higher ranks are populated by private universities, there tends to be a broad correlation of better universities being more expensive. That said, the most expensive school in the top 50 ranks is actually the University of Southern California, tied at 28th, for $68,237/year.
As it happens, also tied at 28th, the University of Florida is the most affordable public school for in-state students ($6,381/year) and Florida State University tied at 53rd, is the most affordable for out-of-staters at $21,683/year.
However these costs are tuition-only, and don’t account for other necessary expenses: accommodation, food, and textbooks.
Best University versus Best “Fit”
Finding the best university for prospective students is more than just perusing a long ranking list.
Aside from the numerous schools present within each university—which can often be the best for specific majors—factors like location, proximity to family, campus culture, the non-academic pursuits (sports, extracurriculars, internships) are also taken into consideration.
In fact, research has found that just attaining a university degree improves future earnings potential and employability.
Furthermore, individual engagement at college (irrespective of the rank of the school in question) plays a far bigger role in learning and general well-being than simply attending a highly-ranked school.
However, for low income and minority students, attending a top-ranked school does improve future earnings considerably. For women, it also often results in delaying marriage and kids, which results in more work-hours and as a result, more pay.
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