This is a (math) joke.

Please answer the following equations: 

Answer: Tree + tree+ tree = 9.

(There was a sandstorm.)


Answer: Dirty tree + dirty tree+ dirty tree = 99.

(I think you can guess what happened.)


Answer: Dirty tree and a turd + dirty tree and a turd + dirty tree and a turd = 100.

I thought it was funny...


(Pictures by yours truly.)