For those who've never heard, Kool Keith is beloved by many fans of hip-hop for his work with the Ultramagnetic MCs over a decade ago, but he continues onward as Dr. Octagon as a collaboration with Dan The Autmator, making quirky cool hip-hop over Dan's tripped out beats.

 He's recently released possibly the first hip-hop track about global warming, and I urge you all to check it out.  (It's YouTube so the sound quality is crap, but grab it off the web somewhere if you want the high quality version.)