Pure Earth 25 years of prevention testing
Pure Earth has spent 25 years testing lead-prevention strategies, leading to a proven three-step government model.
Snapshot · TED Talks Daily
The deadly threat affecting millions — and how to prevent it | Drew McCartor
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Jul 10, 2026
Where this was said
Pure Earth's Three-Step Model: Survey, Identify, Regulate
At 16:30 · chapter starts 16:00
Having established the scale of the crisis, McCartor pivots to the solution — and he's unusually specific. Pure Earth has spent 25 years field-testing lead-prevention strategies across diverse environments, and the learnings have crystallised into a three-step model designed for government adoption. Step one: conduct a nationally representative survey of children's blood-lead levels, typically requiring a few thousand tests. The goal isn't just measurement — it's motivation. Governments that see their own data almost always respond, because the numbers are nearly always alarming. Step two: identify local exposure sources. McCartor pushes back gently on the Western assumption that old paint and pipes are the main culprits everywhere. In other countries, the lead comes from food and spices, traditional cosmetics and medicines, ceramic glazes, cheap aluminum cookware, and industrial pollution — the sources are wildly variable and must be identified on their own terms. Step three: regulate and remove. This means tightening standards, building enforcement capacity, and cleaning up old contaminated sites [1] — Drew McCartor "Survey children's blood-lead levels to establish a national baseline. Identify the local exposure sources — which vary wildly from spices t…" 16:30 . McCartor is careful not to oversell the simplicity: 'I don't want to pretend like it's easy. It's not easy, but it's also not rocket science.' His confidence comes from evidence — the model works when governments commit to it.
Pure Earth's Three-Step Model to Beat Lead
Survey children's blood-lead levels to establish a national baseline. Identify the local exposure sources — which vary wildly from spices to cookware to industrial pollution. Then regulate and remove lead from the economy. That's it. 25 years of testing says it works.
Georgia Cut Lead Levels by 75% — Contaminated Spices Were the Culprit
In 2018, 41% of Georgian children exceeded the WHO lead threshold. The source: lead-based pigments added to spices for vivid color. After Pure Earth helped tighten regulations and enforcement, lead levels in the hardest-hit regions dropped 75%.
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