“2°C: Beyond the Limit” pioneered the use of temperature data, demonstrating that extreme climate change is already a life-altering reality across 10 percent of the Earth’s surface. The Post analyzed global datasets tracking nearly 170 years of temperature records to map every place that has already warmed by 2 degrees Celsius (3.6 degrees Fahrenheit) – the threshold international negotiators hope the planet as a whole will never reach.