Every year, 8th June marks World Ocean Day, a moment to pause and reflect on the vast blue that covers over 70% of our planet. But while its surface beauty is undeniable, the ocean is so much more than a pretty postcard—it quietly works behind the scenes, doing more for us than most of us realise.
Here’s what the ocean does for you, every single day:
1. It Produces 50% of the Planet’s Oxygen
Yes, half of the oxygen you’re breathing right now comes from the ocean. Tiny marine organisms called phytoplankton float on the surface and, much like plants, use sunlight and carbon dioxide to produce oxygen through photosynthesis. These little guys might be small, but they do a lot of heavy lifting when it comes to keeping us alive.
2. It Absorbs 30% of the World’s Carbon Dioxide
The ocean is a natural climate warrior, absorbing around 30% of the carbon dioxide we pump into the atmosphere. This helps slow down global warming, but it comes at a cost—more CO₂ in the ocean increases its acidity, threatening marine life like coral reefs and shellfish. It’s a reminder that while the ocean protects us, it needs protecting too.
3. It Feeds Over 3 Billion People
Seafood is a primary source of protein for over 3 billion people worldwide. From coastal communities to landlocked cities, the ocean’s bounty sustains livelihoods and cultures. But with overfishing and unsustainable practices on the rise, it’s more important than ever to support responsible sourcing.
4. It Regulates the Earth’s Climate
Ever wondered why the UK has such mild weather compared to other places on the same latitude? Thank the ocean. It moves heat around the globe through currents, acting like a giant conveyor belt that balances temperatures and keeps our climate stable. Without it, we’d face extreme weather on a whole new level.
5. It Supports Marine Biodiversity
From glowing jellyfish and playful dolphins to colourful corals and giant whales, the ocean is home to nearly 80% of Earth’s biodiversity. Coral reefs, in particular, are like underwater cities—teeming with life and vital to the health of the entire marine ecosystem.
So, What Can You Do to Give Back?
The ocean gives us so much—here’s how you can return the favour with small, everyday actions:
- Reduce plastic: Say no to single-use items like straws and bags—they often end up in the sea.
- Choose sustainable seafood: Look for eco-certifications or try plant-based alternatives.
- Protect coastal areas: Leave beaches better than you found them. Avoid disturbing wildlife or taking shells and coral.
Final Thought
You don’t have to live by the sea to care for it. Every action counts—whether it’s picking up litter in a city park or swapping to reef-safe sunscreen. The ocean is working hard for you. This World Ocean Day, let’s show it some love.