Final answer:
Glass has two advantages as a covering for greenhouses: thermal insulation and optimal light transmission.
Step-by-step explanation:
Glass has two advantages as a covering for greenhouses:
- Thermal insulation: Glass traps solar radiation and prevents heat from escaping, creating a warmer environment inside the greenhouse. This is beneficial for plants that require heat to thrive.
- Optimal light transmission: Glass allows visible light to pass through, providing plants with the necessary light for photosynthesis. It also protects plants from harmful ultraviolet (UV) rays.