TARANTO, Italy -- Farmers in a region of Italy once known for cheeses have turned to cultivating a type of cannabis -- not to smoke or sell -- but to decontaminate polluted soil.

A recent change to federal law allowed states to grow test plots of hemp only at university or government sites and Virginia is one 28 that are doing so.

A recent change to federal law allowed states to grow test plots of hemp only at university or government sites and Virginia is one 28 that are doing so.

Environmental cleanup could be as simple as using natural resources, such as Indian mustard seed, sunflowers and hemp.

As marijuana laws continue to loosen across the country -- and the world -- it looks like hemp could be brought back in a big way.

Hemp advocates say it is fast and cost effective in cleaning up oil spills on land or water.

The fourth annual NoCo Hemp Expo this past weekend featured more than 130 vendors and 60 speakers, all sharing information about this amazing plant.