World Basics · Physical world
Rivers, ports & great cities
Why nearly every major city sits on a river, coast or harbor.
Step 1 of 4 · Overview15 min read ·
| River | Why it matters |
|---|---|
| Nile | longest river (~6,650 km); cradle of Egypt |
| Amazon | largest by water discharge |
| Yangtze | China's economic artery; Shanghai at its mouth |
| Mississippi | moves US grain to the Gulf |
| Rhine | Europe's busiest inland waterway; Rotterdam port |
Water transport has always been the cheapest way to move heavy goods. Cities grew where rivers meet the sea (New York, Shanghai, Rotterdam) or at the first point ships couldn't pass (fall lines).
Key idea
Low Rhine water levels in dry summers have forced barges to carry less, pushing up shipping and energy costs in Germany.Next: Practice