页面
第 10 页CC0 1.0(公有领域)
Cave-water chemistry, invasive-plant dashboards, drought and birds, wastewater treatment and a Saguaro vegetation map: highlights from the National Park Service’s seven Intermountain Region monitoring networks.
第 17 页CC0 1.0(公有领域)
Bent's Old Fort was rebuilt from rubble for the 1976 bicentennial — 160,000 adobe bricks, 800 cottonwood trees, and a design 40% conjecture. The fort's decline and the long road back.
















