An annual international climate report about 2015, released Tuesday, said that “owing to the combination of El Niño and a long-term upward trend, Earth observed record warmth for the second consecutive year.” According to most estimates, 2014 was the warmest year on record, the report says, and 2015 surpassed that by 0.1 degrees Celsius (Fahrenheit), becoming 1.0 degrees Celsius warmer than preindustrial times.
