Funny how one of the oldest food warnings -- that green potatoes are poisonous -- is also one of the least heeded.

You can find a lot of references to this on the Web, but here is a good one: http://nyti.ms/lh7K83

Eating a big baking potato that is green would be enough to make you sick.

Potatoes turn green when they are exposed to light and warm temperatures. That usually happens in your home and it is a sign for you to pitch them out.

However, green potatoes do show up in the clearance produce bins of certain stores. Such potatoes are not a bargain and the store produce managers should know better than to put them out for sale.