Categorize the given article as a news, opinion, cultural or scientific article.
Recent studies have found that sea levels are rising faster than expected, raising concerns about the future of coastal cities.
This is a scientific article.
Complete the following task based on the instruction and optional input provided.### Instruction:
Categorize the given article as a news, opinion, cultural or scientific article.

### Input:
Recent studies have found that sea levels are rising faster than expected, raising concerns about the future of coastal cities.

### Output:
This is a scientific article.