Summary
Michael Jacobson introduces the National Food Museum’s mission to educate and empower the public about food’s impact on health, culture, policy, and the environment, with a strong focus on sustainability and plant-based diets.
Dr. Walter Willett, Harvard professor and leading nutrition epidemiologist, shares his background growing up in a dairy-farming family and how agricultural efficiency has increased food production—often beyond what’s environmentally sustainable.
Willett explains that despite decades of nutrition advice, the American diet remains poor, scoring “failing” on major health indices and contributing to declining U.S. life expectancy.
He identifies three key dietary priorities for health: eating more fruits and vegetables, shifting toward plant-based diets with modest animal foods, and sharply reducing refined starches, sugar, and excess salt.
Willett describes why he expanded his work to climate change, emphasizing the urgency of nonlinear global warming and the role food systems play in greenhouse gas emissions.
The EAT-Lancet Commission found that a largely plant-based “planetary health diet” could prevent roughly 11 million premature deaths per year while staying within environmental limits.
Red meat and dairy have especially large environmental footprints, with beef producing vastly more greenhouse gases than plant proteins; limiting dairy to about one serving per day is more sustainable.
While U.S. beef consumption has declined, global meat consumption is rising rapidly in low- and middle-income countries, raising equity and climate challenges that require global cooperation.
Willett argues for policy changes such as pricing meat to reflect environmental and public health costs, reducing subsidies, and countering powerful agricultural industry influence.
He highlights major gaps in medical education on nutrition but notes growing progress, including policy pressure, increased physician interest, and the rise of lifestyle medicine focused on diet and prevention.
