How Does A Greenhouse Work? Since the Roman times we’ve been using controlled areas to grow vegetables and plants. Greenhouses traditionally are structures with glass walls and a glass roof, and are designed to stay warm inside even during cold winter months. Light enters through the glass and turns the sunlight into heat, which then fills the interior of the greenhouse. Heat has a different wavelength to light and becomes trapped inside your greenhouse. Whilst light transfers quickly through glass, heat on the other hand escapes slowly through glass. The... Read More