Fresh Air Best Of: Nutritionist Marion Nestle / Science Writer Mary Roach
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Nov 29, 2025 
Join Marion Nestle, a renowned food policy scholar, as she discusses her updated guide for savvy shoppers, revealing how supermarkets manipulate us with marketing tactics. She dives into pressing topics like ultra-processed foods and their environmental impacts. Science writer Mary Roach, known for her quirky explorations of biology, shares groundbreaking insights from her latest work on transplant science, including innovations in animal organ donation and the controversial ethics of growing human organs in pigs. A fascinating blend of food politics and medical advances!
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Processed Foods Harm The Planet Too
- Ultra-processed foods contribute disproportionately to environmental damage due to ingredients, processing, packaging, and waste.
- Nestle links food production choices, especially animal-heavy systems, to higher greenhouse gas emissions.
Adopt A Triple-Duty, Plant-Forward Diet
- Favor diets of minimally processed, plant-forward foods to address health, hunger, and climate together.
- Follow simple guidance: eat real food, not too much, mostly plants.
Subsidies Drive Overproduction And Waste
- The U.S. food system overproduces calories because subsidies reward volume, not nutritious outcomes.
- Waste is systemic: only a small portion is supermarket-level while much occurs upstream and at home.
