Global climate has been warming persistently. The year 2001 has become the second warmest year on record since 1860. During the winter 2000, extreme cold and heavy snow weather was experienced in most Asia and the United States. Persistent severe drought events occurred over East Asia, South Asia, West Asia and Central Asia in the first half year of 2001 and serious floods occurred in South Asia, Southeast Asia during the summer monsoon season. Severe floods occurred in Europe, Africa and South America. Activities of the North Atlantic hurricanes were very busy during June through November and typhoons caused serious disaster.