Kamdhenu is the art of living in complete satisfaction in natural surroundings, and using only very limited natural resources and like cow, providing more to nature than taking it. This is the only way that the need of entire humanity can be fulfilled.
Kamdhenu is believed to have emerged from the depth of oceans as a result of churning of ocean. After the great flood, the sea rose to unimaginable levels and the wave formation which is also visualized as churning of ocean stopped. It is said that after a very long period of time, perhaps after lakhs of years, the wave formation or churning of ocean RESTARTED. This is symbolized by Kurma avatar of Lord Vishnu.
The wave formation or churning of ocean once again filled and colored the sea water with various live forms and resources and Lord Vishnu blessed the Humanity that as long as they used these resources as Kamdhenu, i.e. for the purpose of fulfilling their needs these resources will not get depleted and just like tortoise which has a very long life, these resources will remain Kamdhenu (keep on fulfilling the needs of Humanity).
Kamdhenu was an art to do everything blissfully and with honest intent, also with intent and knowledge to ensure that natural resourses do NOT deplete. ant the resoures were getting depleted very fast then. and, like today, this was getting only lip service. This WAS an IMPORTANT reason for repeted Avtar of Lord Vishnu as Lord Parashram And Shri Ram, but I would NOT raise this issue in my subsequent posts, as, already there are lot of other serious issues which the society has to understand.