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第 20 页CC0 1.0（公有领域）
As the body of knowledge and scientific studies linking lead based ammunition and lead toxicity in scavenging wildlife has grown, many hunters have made the switch to non-lead based bullets. Hunters who have switched play a critical role in the health of species such as turkey vultures, ravens…
第 21 页CC0 1.0（公有领域）
Following the publication of the Fourth National Climate Assessment Volume II: Impacts, Risks, and Adaptation in the United States (NCA4), the National Park Service began hosting a series of roundtable webinars to convey relevant findings to national parks. Each roundtable covers one of the 10…
