The Thames has undergone dramatic transformation:
Natural meandering and human engineering (embankments, canals) altered its path, especially through London.
19th-century industrial and sewage dumping made it biologically dead. The 1858 crisis forced action.
Sewage treatment plants and regulations (post-1960s) restored oxygen levels. Salmon, seals, and 125+ fish species have returned.
The Thames Barrier (1982) and embankments protect London from tidal surges.
Docklands regeneration, London Gateway port, and habitat creation reshaped the lower river.
Rowing, kayaking, riverside walks, and passenger boats now define its urban identity.
The Thames exemplifies urban river recovery.