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WHEN it involves international warming, each notch on the thermometer is significant. However one temperature rise has been etched into our minds for years: 1.5°C above pre-industrial ranges. Passing this threshold could set off a number of local weather “tipping factors” that would change the planet irreversibly. The arrival of an El Niño climate occasion and our poor efforts at slicing greenhouse gasoline emissions imply we might exceed 1.5°C of warming as quickly as subsequent yr. That is “uncharted territory” for Earth’s local weather, warns the World Meteorological Group.
Uncharted, maybe, however definitely not unknown. For years, scientists have been finding out …