<div id="readability-page-1">U.S. debt warning: Penn Wharton researchers say the U.S. could hit its debt limit in 20 years, requiring unprecedented tax hikes to stabilize finances. Nature's fiscal risk: Study warns biodiversity loss could raise global sovereign debt costs by $162 billion annually and cut GDP by $2 trillion. Senegal's debt crisis: Hidden debts push Senegal into ratings downgrades and stalled IMF talks, with debt-to-GDP now estimated at 119%.</div>

<p>最近的报告强调了全球债务风险：宾夕法尼亚大学沃顿商学院警告称，美国可能在 20 年内达到债务上限，迫使税收上调；一项研究表明，生物多样性丧失可能每年使主权债务成本增加 1620 亿美元，并使 GDP 减少 2 万亿美元；而塞内加尔面临债务危机，隐性负债使其债务与 GDP 比率达到 119%，导致评级下调和国际货币基金组织谈判停滞</p>

三重债务警告突显全球稳定性的风险