สีเขียว, นิเวศวิทยา, เสียงสะท้อน, สิ่งแวดล้อมที่ยั่งยืน, การพัฒนาอย่างยั่งยืน, หญ้า, Prato, ใบหญ้า, เนื้อผ้า
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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