When scientific sensors detect environmental contamination but cannot identify its source, engaging with local communities who understand the landscape can provide crucial insights; by asking community members about changes in their environment, researchers can narrow down contamination sources through systematic questioning about affected areas, effectively creating a buffer zone around the problem area.
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Why we talk to indigenous communitiesAdded:
listening to an elder tell me that here is a lake where he grew up. And now the lake is no longer fishable because of some input of mercury. [music] Now, okay, mercury is a periodic element. It occurs naturally, but all that we have is a sampling that says mercury levels are too high here.
[music] And now the fish are no good.
But we don't know what the input was.
Like how did this happen? Why is it suddenly there where it wasn't there the previous [music] 70 years? So we talk to the community members say, "Well, what changed?
Are the fish are no good here?
>> [music] >> Uh the skin is like it's flaky. The meat is too soft. What a kilometer downstream is that still the case? Yes.
>> [music] >> How about a kilometer upstream? Is that still the case? Yes.
What about 2 km upstream? No. No, [music] they're fine there. Still clean there.
Well, just in that one little discussion, we've [music] now drawn a 2-km buffer around this lake. And now we have a tightened idea of where that input that's affecting the fish may be coming from.
That's why we talk to the community because they understand this.
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