When we stand on the beach and look at the sea, the ocean seems endless and strong. It is hard to believe that this huge body of water is in danger. But scientists tell us that the ocean is now facing some of its greatest challenges in human history.
Why should we care? First, the ocean produces more than half of the oxygen we breathe. Tiny plants that float near the surface of the water make it every day. Second, the sea provides food for billions of people around the world. Third, it takes in heat and helps keep the earth's climate in balance. Without a healthy ocean, life on land would become very difficult.
However, the ocean is under great pressure. Every year, about eight million tons of plastic enter the sea. Plastic bags look like jellyfish to sea turtles, and broken fishing nets trap birds and fish. Every year, large numbers of sea creatures die because of plastic. Overfishing is another serious problem: some kinds of fish are being caught faster than they can reproduce. In addition, warmer water is damaging the coral reefs, which are home to a quarter of all sea life.
The good news is that everyone can help. We can refuse single-use plastic items such as straws and thin bags. We can take part in beach clean-up activities on weekends. We can choose seafood that comes from responsible fishing. Most importantly, we can spread knowledge among our friends and family, because people protect what they understand and love.
The ocean has taken care of us for millions of years. Now it is our turn to take care of it. The sea may be vast, but every small action adds up — and the future of the blue planet depends on the choices we make today.