6. Are lots of the Pacific islands actually going to disappear?
Likely not disappear, at least not in the short term (through the end of this century), but they will be dramatically impacted. Many low-lying regions will see drastic changes to their coastal geography from beach erosion, significant infrastructure challenges from things like saltwater intrusion into the water system, and population displacement from inundation. There are some extreme examples, such as the Marshall Islands, where 99% of the country lies below 5 meters in elevation, which could literally be "wiped off the map," but the problem is far more wide-reaching than a few tiny Pacific islands. Coastal communities around the world will face higher risks for storm-induced tidal surges, frequent inundation from high tides, etc. Many of the world's largest and most influential cities are located on the coast and must make significant preparations to combat rising sea levels.