Stanley Changnon directs and is engaged in several projects relating to climate of various regions. One aspect involves studies of climate change in fluctuations over scales of decades to centuries. These have focused on climatic change in all types of climate conditions in Illinois, fluctuations in severe storm climate of North America of the century, and global changes in thunderstorms. Another area of climatic research has dealt with climate impacts as they relate to agriculture, water resources, and government. There is an area of climate research relating to use of long-range predictions. Another area has related to inadvertent climate change related to urbanization, irrigation, and jet contrails.