The little ice age lia was a period of cooling that occurred after the medieval warm period although it was not a true ice age the term was introduced into scientific literature by francois e matthes in 1939 it has been conventionally defined as a period extending from the 16th to the 19th centuries but some experts prefer an alternative timespan from about 1300 to about 1850. Tide gauge measurements show that global sea level rise began around the start of the 20th century between 1900 and 2016 the globally averaged sea level rose by 16 21 cm 63 83 in more precise data gathered from satellite radar measurements reveal an accelerating rise of 75 cm 30 in from 1993 to 2017 1554 which is a trend of roughly 30 cm 12 in per century. The planet survived many millennia without anything approaching a world government in fact endured nearly the entire span of human civilization that way organized into competitive tribes and fiefdoms and kingdoms and nation states and only began to build something resembling a cooperative blueprint very piecemeal after brutal world wars . What had been a cold dry tundra on the north western edge of europe grew warmer and wetter as the ice caps melted the irish sea north sea and the channel were all dry land albeit land slowly
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