Detroit's urban farming movement is thriving, supplying fresh produce, jobs and revived communities. Desiree Cooper examines this new food-based economy and the issues holding it back.

Alison Stewart interviews reporters Phillip Longman and Julia Whitty to discuss how the challenges of population control can be met, and just how serious they are.

As the world steadily marches toward record-breaking population figures, Need to Know time travels to the late ‘60s/early ‘70s, a small window of time when “overpopulation” was a frightening issue that occupied a substantial slice of the American psyche.

Hear some voices from Youngstown, Ohio, which has lost more than half its population and has an ambitious plan to rebuild through shrinking.

Can cities like Detroit, Cleveland and Youngstown, Ohio, make a comeback? Reed Kroloff, director of Michigan's Cranbrook Academy of Art, thinks so.

How do the industrial cities of the Rust Belt deal with massive population losses? Youngstown, Ohio, is trying to return the city to its former greatness, albeit on a smaller scale.

Post-industrial cities are facing steep population loss and vast expanses of abandoned property - a phenomenon known as "shrinking." Dan Kildee. president of Community Progress and a leader in the Shrinking Cities movement. talks to Alison Stewart about the need for a national agenda, and the mental shift Americans will need to make before they stop seeing downsizing as failure.

Filmmaker Derrick Jones documented his own family's history in one house in Youngstown, Ohio. The film "631" chronicles the many good times over the years, as well as the difficulties in maintaining the house with little income, especially after two fires. It is the story of one house, now abandoned, that was once filled with life.

Not too long ago it appeared that the United States was gaining steam in the pursuit of high-speed rail. But recently billions of dollars allocated to high speed rail have been slashed from federal and state budgets. Transportation infrastructure projects create jobs and keep countries competitive, so why the hesitation? Blogger Gridlock Sam reports on the tug-and-war between politics and progress.

A recent article in The Economist details just how far behind the United States is when it comes to infrastructure investment. Is the US doomed to stay in "the slow lane"?

Approximately 53% of Detroit's police force live in the suburbs. Now Detroit's Mayor Bing is trying to entice them back in by offering to contribute to their inner city housing costs. Safer communities and better schools drew them out... can cash incentives lure them back in?