Mary l, I didn't know about Greenworks; very interesting what can be learned from this list! I hope it isn't toxic like Clorox; I bet the label has info about that too. I have herbal supplement bottles that are identical and the optacon is the only way to figure out what's what. Mary to view the list archives, go to: www.freelists.org/archives/optacon-l To unsubscribe at any time, just send a message to: optacon-l-request@xxxxxxxxxxxxx with the word "unsubscribe" (without the quotes) in the message subject. Tell your friends about the list. They can subscribe by sending a message to: optacon-l-request@xxxxxxxxxxxxx with the word "subscribe" (without the quotes) in the message subject.