Quote Originally Posted by TurnyBright
What is the atmosphere? The basic necessity of life, or simply a conglomeration of random gaseous chemicals that all are mixed up on the surface of this planet by coincidence and a complicated series of chain reactions?

You seem to be reasserting the fallacy that oxygen (or any particular element or molecule or chemical reaction) is vital for the development of life. Without a clear sense of the nature of "life" itself, how can we distinguish the requisites for it's development? There is no satisfying definitive explanation for what life is, beyond no-meaning dictionary phrases such as "the principle or force considered to underlie the distinctive quality of animate beings."

So yes, for any area to be considered an ecosystem, there must be life interacting with non-life, but since we have no way of knowing what matter is in fact "alive" and what is not (except for how it aesthetically appeals to us), not only is every existing ecosystem fully replaceable, but areas that are obviously not ecosystems must always be considered potential ecosystems. After all, life developed from non-life at some point, another thing we don't understand that could easily be happening constantly across the universe in a multitude of different (and mostly unrecognizable to us) ways.
Fallacy? For someone did not offer any cognitive proof that life can exist without factors facilitating the bonding of elements, you sure got a lot of reassurance from abstract concepts that have no scientific foundation. You reject centuries of studies for an idea that based on the rejection of all science since they have not yet offer proof beyond a doubt explaining every single concept of life.

The nature of life fully can't be explained fully yet. However, there is enough information that can be determined that all living things on the planet earth from simple prokayotes, to plants, to complex creatures such as human all produce DNA. In order for DNA to be replicated, all living creatures must acquire the necessary minerals in order to replicate. What is requires varies and years of evidence has shown that could change. What do you think the concept of evolution is all about? Genetic mutation? For all creatures on earth, they is plenty of evidence that organic elements, notably carbon and hydrogen are necessary to reproduce life. There is an entire field based on the study of these reactions, called organic chemistry.

On your point that any potential areas could become ecosystem, yes there is a possibility. Like there's a possibility God exists. It's very abstract and vague. Have we found anything different at this point?

We might never know the answer of how life was created from non-life, or even other possibilities. To suggest that organic elements are not necessary for life is simply wrong. There is plenty of proof available that was carried over eras.