Is winter the cure for depression?

Living indoors is well known to be the cause of depression. Naturally we are supposed to go outside and see the plants dying every winter. There's a popular theory that depression is a self-helping mechanism, we begin to die a little as an attempt to witness death, due to a death deficiency. In other words plants are dying for our entertainment so that we don't have to die inside. You can call me the plant-based christian, I believe plants die for us and we don't have to suffer.

Is winter the cure for depression?
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