Carbon Dioxide is called, in short, a Greenhouse Gas" because a) originally thought of in Horticulture as a set of nutrient or expelled Gasses found in the horticultural Greenhouse, used by plants and trees which convert CO2, one of the gasses, to oxygen and use or emit other gasses (it was originally noted that if such gasses built up in the top of a Horticultural Greenhouse, under the Roof, som