Speaker: Ronnie Levin, M.A., Visiting Scientist, Harvard TH Chan School of Public Health
Title: Lead seasonality in humans, animals, and the natural environment
Short Bio: Ronnie Levin spent most of her working career at the US Environmental Protection Agency as a senior scientist; she retired from EPA in 2017. Ronnie developed and successfully lobbied EPA to reduce lead in drinking water. She was also one of the people responsible for EPA’s reducing lead in gasoline. More recently, Ronnie developed methods to more fully estimate the costs of 16 health end points associated with occupational lead exposures.
Abstract: Lead adversely impacts the health of humans, animals, and the natural environment. Higher lead burdens in warm weather occur in humans, domesticated and wild animals; land and water species; urban and rural, developed and pristine environments. The array of evidence suggests that lead seasonality is multifactorial within the natural world, including humans. Seasonally higher temperatures, solar radiation, humidity and anthropogenic pollution result in lower pH (acidification) in air, water and soil. Environmental acidification increases lead’s bioavailability and mobility thus intensifying human, animal and plant exposures. In addition, lead seasonality in the biosphere is influenced by higher growth rates, slightly increased exposures, and more Vitamin D metabolism. Methodologically, we applied a One Health perspective to EPA’s Integrated Science Assessments of Lead to review the published literature, supplemented with subsequent and related publications to assess data on the seasonality of lead exposure across species and through the earth’s systems. Our integrated assessment suggests that: 1)’Seasonality’ is a multifactorial, terrestrial phenomenon affecting the natural world; human activities have exacerbated natural cyclicities that impact lead exposures across species. 2) To be sustainable, human lead remediation strategies must consider the total environment. 3) Global warming and climate change events may increase lead exposures and toxicity to all species throughout.
*Light lunch will be provided. We are trying to be more eco-friendly, so please bring your own reusable cup or water bottle.
