How Do People Use the Ocean? Ten Major Ways

The ocean is humanity's greatest shared resource. Here are ten fundamental ways we use it:

1. Food (Fisheries & Aquaculture): ~170M tonnes/yr; 15% of global animal protein; 3.3B people rely on fish for 20%+ of animal protein.
2. Shipping & Trade: 90% of global goods by volume move by sea; 50,000+ merchant ships.
3. Energy: Offshore oil/gas (30% of global oil); growing offshore wind (60+ GW installed); tidal, wave, OTEC prototypes.
4. Mining: Seabed minerals (polymetallic nodules, cobalt crusts, massive sulfides)—nascent industry.
5. Recreation & Tourism: Coastal tourism = 5% global GDP; cruises, diving, surfing, beaches, marinas.
6. Climate Regulation: Absorbs 90% excess heat, 25% anthropogenic CO₂; drives weather via heat transport.
7. Transportation (People): Ferries, cruise ships, water taxis, commuter routes (Hong Kong, Istanbul, Seattle).
8. Scientific Research: Climate, biodiversity, geology, pharmacology (marine drugs), archaeology.
9. Desalination: 100M+ m³/day fresh water for 300M+ people (Middle East, California, Australia, Spain).
10. Cultural & Spiritual Value: Indigenous connections, heritage sites, artistic inspiration, mental health ("blue space").

Emerging Uses

• Marine carbon dioxide removal (alkalinity enhancement, seaweed farming).
• Floating solar, hydrogen production, data centers.
• Deep-sea genetic resource prospecting.

Sustainable use requires integrated ocean management—balancing extraction with the ocean's capacity to regenerate.