Climate, climate change, climate fluctuations and climatic trends are only a few of the terms used today, in not only conferences, scientific symposia and workshops, but also parliaments and in discussions throughout society. To climatologists these terms may be well known; to the vast majority of people, however, they are new, and they require definition and explanation. The World Meteorological Organization (WMO) inherited an interest and involvement in the studies of climate and climate change from its predecessor, the International Meteorological Organization (IMo), which was established...