How to pronounce “unreactive” in English

of the land masses poking up through the salty ocean were volcanic in nature. And so, we have a nitrogen and carbon dioxide atmosphere.The nitrogen was still around at that time--very unreactive. The carbon dioxide was many-fold greater than it is today. Most of that carbon dioxide has now turned into limestone. Butback then, that was our atmosphere. No oxygen to speak of. There is a lot of energy available.