evidence: A new study from Climate Central, a nonprofit research group, shows that roughly 50 major coastal cities will need to implement "unprecedented" adaptation measures to prevent rising seas from swallowing their most populated areas. [...] Small island nations at risk of "near-total loss" of land, the report says, and eight of the top 10 areas exposed to sea level rise are in Asia, with approximately 600 million people exposed to inundation under a 3-degree warming scenario. [...] If the planet hits 3 degrees, Climate Central reports that roughly 43 million people in China will live on land projected to be below high-tide levels by 2100, with 200 million people living in areas at risk of sea level rise over the longer term.