http://www.sxc.hu/browse.phtml?f=view&id=567740
Inside the greenhouse, plants, soil, and air absorb the light. They heat up. The heat is trapped inside the greenhouse. It makes the greenhouse very warm inside, even in the winter!
Inside the greenhouse, plants, soil, and air absorb the light. They heat up. The heat is trapped inside the greenhouse. It makes the greenhouse very warm inside, even in the winter!