Or not. The so called greenhouse effect is not what keeps a real greenhouse warm. Here's the relevant wikipedia quote: "a greenhouse is not primarily warmed by

Or not. The so called greenhouse effect is not what keeps a real greenhouse warm. Here's the relevant wikipedia quote: "a greenhouse is not primarily warmed by the "greenhouse effect". A greenhouse works primarily by allowing sunlight to warm surfaces inside the structure, but then preventing absorbed heat from leaving the structure through convection." https://en.m.wikipedia.org/wiki/Greenhouse_effect https://en.m.wikipedia.org/wiki/Greenhouse_effect