Yes, Dream Star Terrazzo can be used for exterior applications in very dusty climates. Terrazzo is a durable and versatile material that is commonly used for both interior and exterior applications. It is resistant to dust, dirt, and stains, making it suitable for dusty environments. However, proper installation and maintenance are crucial for ensuring the longevity and performance of the terrazzo surface in such conditions. Regular cleaning and sealing can help protect the terrazzo from dust and allow it to withstand the harsh elements of dusty climates.