blue rendering

I’m having trouble find how to remove the blueness in my renderings. I saw in other forums that I should turn the environment to none in the cam tab, that that was in LuxRender, but I’m just using Blender 2.4.9. I can’t find anything related to the “environment” that does the trick.

Please help! I need to submit something before Saturday. Thanks so much.

so sorry, I realize this should go in the rendering section. Is there no way to delete?