溫室效應示意圖白板動畫

Hand-drawn diagram of the greenhouse effect: a large curved section of the Earth's surface along the bottom with green hills, a few trees and one small factory with a chimney. Above the ground a soft see-through pale blue band of air arches across the picture like a blanket. In the top left corner a bright yellow sun sends three straight yellow ray arrows down through the air band to the ground. From the warm ground, three wavy red heat arrows rise up: one passes out through the air band into space, the other two hit the underside of the air band and bend back down towards the ground. Nothing else in the picture. Coloured pencil and watercolour marker, clean black ink outlines, warm off-white paper, no text.