gaseous

Its sound is like a gaseous rumbling from deep within the earth—or our bellies.

Another concerns the gaseous nebulas in which the planets and their stars formed.

In one marketing brief it was referred to as “removing gaseous contaminants” from the air supply.

Her gauzy, often gaseous, rhetoric made her sound like a dean of students at a small liberal arts college.

Along with gaseous reactive nitrogen, satellites burning up as they re-enter the atmosphere at the end of their lives leave tiny particles of aluminum oxide, imperilling the still-recovering ozone layer.