Why is it always windy around the base of tall buildings.?

Question

My 7 year old just asked me this question and I didn't have an answer.

Answer 1

Well if you go to the top of the building,get on top of the roof,you'll find it's windy up there too.

Answer 2

I was thinking he same question. I guess it has something to do with the structure of the building. It's like gale force winds outside my block.

Answer 3

because the higher you are the more wind there is.