Evaporation from oceans along with other water bodies in to the air and transpiration from land crops and animals in the air. Oxygen dihydride is yet another way of referring to water, but contemporary utilization generally restricts the time period "hydride" to ionic compounds (which water is not). Its hydrogen https://kevalaniru.com/keralas-ban-on-single-use-plastic-bottles-a-step-toward-a-greener-future/