dustan: imagine you as a human being. we increase your body temperature b by two degrees, yu have a fever,r, right? we incree it by ananother two o degrees, d yoyou're dead. that's what's happening to the reefs. if you recover from your fever, you can go on to be a perfectly healthy person. the reef can n go on to b be a perfy healthy reef if this was just a one-time stress. if it b becomes a chronic stress, and every year it gets worse, slowly those corals that survived this year might not survive next year or the year after or the year after or the year after. narrator: scientists s have connfirmed a dramatic c rise in oceanan temperatures overer thet two decades. every day, humans are pushshing more t than 100 millllion tons o of carbon d die into the earth's atmosphere. this co2 is being absorbed by our earth's oceans, contributing to rising water temperatures and acidification, which are catalyzing the sudden demise of coral reefs worldwide... from healthy to threatened to dying. the coral triangle of southeast asia