In the United States, hundreds of inmates are finding redemption in conservation. We meet some of these prisoners who are embracing a project that brings science and nature inside their prison walls.
Today, the trio are among hundreds of inmates within Washington state's penal system who have embraced a project that brings science and nature inside the prison, with an impact that goes well beyond the four barbed wire walls.
The initiative, known as the Sustainability in Prisons project, started back in 2004. It's since been copied by nine other American states, with constant interest from around the globe.