Snow comprises individual ice crystals that grow while suspended in the atmosphere-usually within clouds-and then fall, accumulating on the ground where they undergo further changes.
The Independence Day of Brazil, commonly called Sete de Setembro, is a national holiday observed in Brazil on 7 September of every year.
Earth Day is an annual event scheduled for April 22 to show support for environmental protection.
Coronavirus disease (COVID-19) is an infectious disease caused by a newly discovered coronavirus.
