Biodiversity hotspot:

Perhaps a bit of text about endangered animals.

Urban area:

Town name.
Perhaps some information about population.

Sediment problem:

A short description of a problem.

Sediment solution:

A short description of ongoing efforts at curbing an issue.

Natural habitat:

Highlighting an important ecosystem.

Weather and natural disasters:

Notes about frequent or historical weather events.

Industry and agriculture:

Notes about any nearby industrial human activities.