The state of being in the sun as much as possible with out protection.
A natural dark tan and minor bleach of hair are the evidence of living in a tanvironment. Species of tanned humans are usually produced here. A tanvironment can be a pool, lake, etc. The subject of a tanvironment (brosephs) usually is in his/her tanvironment in the summer and hibernates in the winter while still keeping a tan. Flowsectomies usually occur in the summer.
I just got a flowsectomy from staying in my tanvironment the whole week.