Stay away from the red plants …
This is a very impressive project that is taking genetic engineering into whole new areas of usage. Yes … as the title of the article reads … they have created a plant that will change it’s color if its roots come into contact with a landmine. Green is good … red is bad!

I found two articles about this:

Genetically Engineered Plant Can Detect Landmines. Red Nova Jan 27 2004 7:00PM GMT [Moreover – moreover…]

Flower Power Takes on Land Mines. A Danish biotech company develops a genetically modified flower that changes color when the plant is close to a land mine, making it easier to track down and remove the hidden explosives. [Wired News]