Hi Fiona,
We're glad to hear from you again, sounds like you're on a very interesting path. Organic food, clean air, etc. I've heard an interesting report on the radio yesterday. It's about spice, used in cooking called SAFFRON, that can relieve depression without side effects. Just search the web for (saffron & depression) and you'll find find lots of info and even some clinical tests. I haven't tried it myself, but I thought I should pass it on to you.
Take care & enJOY life.
Max