海で二酸化炭素が飽和し、大量絶滅へ向けた転換期に達しつつあるという研究報告（米研究） (3/3ページ)
References:'Completely Terrifying': Study Warns Carbon-Saturated Oceans Headed Toward Tipping Point That Could Unleash Mass Extinction Event | Common Dreams News/ written by hiroching / edited by parumo
