Why Does Rain Have Chemisty?

Why does rain have chemistry? Why are we so familiar that we never just gawk in wonder at the clouds? Why do we not wonder at the union of hydrogen with oxygen as at a mysterious marriage in some ancient cathedral with bride and bridegroom in sacrament? Why do we not wonder at the improbability of water? And even more so: how it comes out of the atmospheric anatomy of cloud? And why should an August day make molecules change into another state that can rise?Perhaps we know how, but will we ever know why?

So many why's to the world.