What is always in front of you but can’t be seen?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

It is always ahead of me yet I can never see it. What is it?

You can see it everyday, But cannot touch it at will. What is it?

I have teeth but i don't bite. Who Am I ?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

Which five letter word can be added at the end of below word to form a
valid word?

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The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?