Why is it difficult to establish a society on an island?

Because island is surrounded by ocean. In ocean it is very dangerous to establish society. When tsunami comes and overflow land it will destroy the country or society. Island is not safe for establishing society.

in the long term, the benefits of mitigation will outweigh the costs. climate change can have large consequences, such as more extreme weather events and a rise in sea level. society can adapt to and mitigate climate change to cope with these challenges. both adaptation and mitigation have their costs and benefits.