Unfortunately, many of these long-term responses are difficult to pay for and maintain. They are not always successful and don't always help enough people.

Global mean sea levels have risen faster in the 20th century than in any prior century over the past 3,000 years.

cause coastal areas to be flooded and can devastate the impacted areas. Flooding is becoming more common as the climate of the planet changes. Places such as Bangladesh are most prone to flooding.