Reducing building toxicity and improving childhood nutrition . Guests: Mary Ann Greene, founder of The da Vinci School (in North Dallas ) about making her wonderful new building safe for the health of her students and the environment. Alfred R. Johnson, D.O. , a doctor of internal medicine specializes in chronic illness, allergy and environmental medicine. Tracee Yablon Brenner, a dietitian and holistic health counselor is the founder of RealFoodMoms.com and has co-authored Great Expectations: Best Food for Your Baby and Toddler and Simple Food for Busy Families .