Yes, Palestines Bone White Limestone can be used in exterior applications in very dusty climates. Limestone is a durable and versatile natural stone that is suitable for various outdoor uses, including facades, cladding, paving, and landscaping. It can withstand dusty conditions and is resistant to weathering, making it a suitable choice for such environments. However, regular maintenance, including cleaning and sealing, may be required to prevent the accumulation of dust and maintain its appearance over time.