Can Eggshells Save One of Mexico's Most Polluted Rivers?

The Lerma river in Mexico is one of the most polluted rivers in the country. Water from the river leaves behind yellow stains and causes headaches and dizziness. To help bring clean, drinking water to the community a scientist and a resident in Lerma co-found the H2O Lerma With Charm collective. One of the things the group does is create filters from eggshells they install in the local wells. Eggshels, which are high in calcium, combined with magnesium can reduce heavy metals in water by 80 percent. The collective has close to 70 members and have installed filters in seven local wells.

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