As a kid, my Mom used to warn me not to swallow any seeds for they would grow into a 'tree' in my tummy!

A few years later I realized that she was simply worried about my choking on seeds and it was her way of protecting me.

But apparently not so! Folks are sprouting pea plants and growing fir trees in their lungs!

"Roy Sveden of Brewster, Mass., who was shocked and relieved when he learned that what he thought was a cancerous tumor in his lung was actually a half-inch long pea sprout. He joins Artyom Sidorkin, a Russian man who was found to have a five centimeter long pine tree growing in his lung"

http://www.bbc.co.uk/news/world-us-canada-10945050

Talk about being green - now here's an example of sustainability at its best!