<span>February 29 is a date that usually occurs every four years, and is called a leap day. This day is added to the calender in leap years as a measure, because the earth doesnt orbit around the sun in exactly 365 days (1 year). The gregorian calendar is a modification of the julian calender first used by the romans. </span>
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The answer is a highly developed nation with an aging population
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In artic areas, the annula temperatures is often below Freezing point
Oil is what those countries rely on the most
so that we have are free will
