Answer:
I have an eye but cannot see. I take time to generate and can dissipate in seconds. What am I?
My days are numbered. What am I?
I am milky white and scares people.
I save lives on the ground and in the air. What am I?
I've been around for millions of years, but I am no more than a month old. What am I?
No matter how little or how much you use me, you change me every month.