P.S.

Got this email from Joel Prock... check it out!

I saw this on tv earlier and I thought it was really cool! There was also a part of the episode that talked about forcing CO2 into the ground to extract oil but I couldn't find that part on the internet. Hope you're having a great summer!

-Joel

http://www.history.com/shows/modern-marvels/videos/green-algae