Well, I was lucky enough to find a large biohazard symbol on Google's image search. So, I copied and pasted that onto a new layer. Then I mucked around with some layer styles which gave that tricky design inside the logo.
The outer circle was just a circle that I segmented in certained places. I added a slight gradient overlay to that.
The grunge was done with a couple of grunge brush sets I found kicking around on my computer. You'll find grungy brush sets kicking around the web easily.
Is there any way you could get me just the biohazard sign and that cirlce around it? I wanna use it for something...and I really love that green color..