The Earth is currently in an inter-glacial period over which temperatures should be rising very gradually. However, since the 19th century temperatures have been rising at an abnormally fast, almost feverish rate.
地球正處在間冰期，長期來看，溫度曲線極為緩慢的爬升，但十九世紀之後的地球增溫，速度卻快得異常。