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It is a scenario climate scientists have feared since first identifying "tipping points" - delicate thresholds where a slight rise in the Earth's temperature can cause a dramatic change in the environment that itself triggers a far greater increase in global temperatures.
Source: wiktionary
Some researchers worry that rainforests will soon reach a tipping point — a point of no return in which the once-lush forests transition to arid regions.
Source: wiktionary
Climate scientists have detected warning signs of the collapse of the Gulf Stream, one of the planet’s main potential tipping points.
Source: wiktionary