Ozone Layer Saved: Montreal Protocol Signs History
World leaders signed the Montreal Protocol to phase out ozone-depleting substances, triggering a concrete recovery of the Antarctic ozone hole that scientists project will return to 1980 levels by mid-century. This unprecedented global cooperation stands as the most successful international agreement in history, uniting 197 parties in a universal ratification that other environmental treaties have yet to match.
September 16, 1987
39 years ago
Key Figures & Places
What Else Happened on September 16
Severus II had been handed the western Roman Empire by Galerius, but Maxentius — the son of the retired emperor Diocletian — refused to recognize him and raised…
The Sixth Ecumenical Council condemned Pope Honorius I for heresy, formally excommunicating him decades after his death. This rare rebuke shattered the doctrine…
Owain Glyndŵr accepted the title of Prince of Wales from his followers, igniting a fierce, decade-long rebellion against English rule. This uprising crippled th…
There were 102 passengers crammed onto the Mayflower, but the ship wasn't meant for them — it was a cargo vessel, roughly 100 feet long, still reeking of the wi…
His father died in exile, and he was thirteen years old. James Francis Edward Stuart inherited the Jacobite claim to the British throne on September 16, 1701, o…
Campo Maior was a small Portuguese frontier town of maybe 2,000 people. In 1732, lightning hit the town's armory during a storm. The resulting explosion didn't …
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