How Much Environmental Damage Will Notre Dame’s Lead Roof Cause?

Nicolas Liponne/NurPhoto via ZUMA

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We get questions:

That’s a lot of lead. And I am not an expert in how lead circulates in the atmosphere. However, for two reasons I suspect this isn’t too big a concern:

  • Most of the lead melted and fell into the cathedral. I can’t put a number to this, but I imagine that only a tiny fraction was carried away into the atmosphere. Pure lead is quite heavy.¹
  • It’s a one-time occurrence. Lead mostly poses a danger when children are exposed to it for long periods of time. In this case, however, they’ll probably be exposed for only a few days before it all settles or drifts away.

I too would like to hear from an expert about this, but in the meantime my best guess is that the release of lead into the atmosphere is a fairly minor issue.

Note that I’m talking here about the effect on the area surrounding the cathedral. Needless to say, lead contamination inside the cathedral is likely to be a big problem for the cleanup crew.

¹As opposed to the lead in gasoline, which comes in the form of tetraethyl lead. This molecule contains 20 hydrogen atoms, 8 carbon atoms, and one lead atom, which makes it relatively light. It’s still heavier than air, but not so much that it can’t drift quite a distance on wind currents.

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SIX TRUTHS

Reclaiming power from those who abuse it often starts with telling the truth. And in "This Is How Authoritarians Get Defeated," MoJo's Monika Bauerlein unpacks six truths to remember during the homestretch of an election where democracy, truth, and decency are on the line.

Truth #1: The chaos is the point.

Truth #2: Team Reality is bigger than it seems.

Truth #3: Facebook owns this.

Truth #4: When we go to work, we're in the fight.

Truth #5: It's about minority rule.

Truth #6: The only thing that can save us is…us.

Please take a moment to see how all these truths add up, because what happens in the weeks and months ahead will reverberate for at least a generation and we better be prepared.

And if you think journalism like Mother Jones'—that calls it like it is, that will never acquiesce to power, that looks where others don't—can help guide us through this historic, high-stakes moment, and you're able to right now, please help us reach our $350,000 goal by October 31 with a donation today. It's all hands on deck for democracy.

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