Check this out:

http://www.naturalnews.com/Index-Cartoons.html

I don't know what the copyright deal is with this site, but I bet they would be open to more promotional places like this one (at Icarus)!

Here are some specific peices:

http://www.naturalnews.com/021953_medicine_chemicals_beliefs.html

and

http://www.naturalnews.com/022040_food_water_organic_farming.html

and

http://www.naturalnews.com/021943_ritalin_adhd_Adderall.html

and

http://www.naturalnews.com/021902_sunscreen_cancer_Vitamin_D.html

What others would you recommend? Do share!