Answer:
The more there is the less you see.
I am quick when I'm thin. I am slow when I'm fat. Wind is my worst nightmare. What am I?
Die without me, never thank me. Walk right through me, never feel me. What am I?
Lives in winter, dies in summer, and grows with its roots upward. What is it?
I am the reaction after enjoying soda.
The answer I give is yes, but what I mean is no. What was the question?