An extensive investigation by the Reuters news agency has found that many children living on U.S. military bases may be exposed to hazardous levels of lead in decaying family housing.

High school students teamed up with Columbia University researchers to learn about local exposure to this toxic element. Along the way, they learned about history, field work, and the scientific process.

An ongoing study finds that 92 percent of private yards in Greenpoint may have unsafe levels of lead in their soil.

Experts from the Columbia Water Center, the Earth Institute and affiliates talk about the municipal water crisis in Flint, Mich., the nature of the crisis and what it means for America’s Water.