Oscillating Water Column PNG Images (3)
Oscillating Water Column PNG Images (3)
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World Water Day is a United Nations day observed each year on 22 March to highlight the importance of freshwater.
World Coconut Day on September 2nd celebrates the global importance and versatility of the coconut.
Masks are effective only when used in combination with frequent hand-cleaning with alcohol-based hand rub or soap and water. The correct way to wear and dispose of masks.
Columbus Day is a holiday observed in the United States on the second Monday of October each year.
