<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>最近的報告強調了全球債務風險：賓夕法尼亞大學沃頓商學院警告稱，美國可能在 20 年內達到債務上限，迫使税收上調；一項研究表明，生物多樣性喪失可能每年使主權債務成本增加 1620 億美元，並使 GDP 減少 2 萬億美元；而塞內加爾面臨債務危機，隱性負債使其債務與 GDP 比率達到 119%，導致評級下調和國際貨幣基金組織談判停滯</p>

三重債務警告突顯全球穩定性的風險