研究人员周四表示，数百万公顷的受保护热带生态系统正面临采矿特许权和油气区块重叠带来的风险，这可能削弱一项旨在到本十年末保护全球30%陆地、淡水和海洋的全球条约。
Millions of hectares of protected tropical ecosystems are at risk from overlapping mining concessions and oil and gas blocks, researchers said on Thursday, potentially weakening a global treaty aimed at conserving 30% of the world's land, freshwater and oceans by the end of the decade.