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World Ocean Day: Why Marine Protection Has Never Mattered More

June 8 marks World Ocean Day, a global moment to reflect on what the ocean gives us and what we owe it in return. The ocean produces around half of the world’s oxygen, absorbs approximately 25% of all CO₂ emissions, and supports the livelihoods of more than 3 billion people worldwide (UN Environment Programme, 2021). Despite this, less than 8% of the global ocean is currently under formal protection (Marine Conservation Institute, 2024). 

The 2026 World Ocean Day action theme, “Strong Marine Protected Areas for Our Blue Planet“, responds directly to that gap. It supports the global “30×30” commitment, an international agreement to protect at least 30% of the world’s oceans and lands by 2030, endorsed by over 100 countries at the 2022 UN Biodiversity Conference (CBD COP15). 

The urgency is real. Scientists estimate that more than 1 million marine species are at risk of extinction (IPBES, 2019). Plastic pollution adds an estimated 11 million tonnes of waste to the ocean each year, a figure projected to triple by 2040 without systemic intervention (UNEP, 2021). Ocean warming and acidification, driven by climate change, are bleaching coral reefs at unprecedented rates, with the Great Barrier Reef experiencing its most widespread bleaching event on record in 2024 (Australian Institute of Marine Science, 2024). 

These pressures do not affect marine life alone. Coastal communities, food systems, and climate stability are all downstream of ocean health. 

CVA’s Role in Coastal and Marine Ecosystem Health

At CVA, our focus sits at the intersection of coastal wetlands, estuaries, and marine environments. These systems are deeply interconnected: healthy coastal wetlands filter agricultural runoff before it reaches the sea, mangroves act as nurseries for commercially important fish species, and seagrass meadows store carbon at rates up to 35 times faster than tropical forests (CSIRO, 2022). 

Through our coastal restoration and wetland management work, we are contributing to the resilience of these systems. Wetland restoration improves water quality, reduces erosion, and supports wildlife corridors that connect terrestrial and marine habitats. Healthy wetlands are, in practical terms, a direct investment in healthier oceans. 

How You Can Make a Difference 

Protecting our oceans requires action at every level, from international policy to local habit. Here are practical entry points: 

  • Reduce single-use plastics. Choose reusable bags, bottles, and containers. Plastic that enters waterways rarely stays there. 
  • Join a local clean-up. Beach, river, and wetland clean-ups make a measurable difference. Even a single event can remove hundreds of kilograms of waste from coastal environments. 
  • Support coastal habitat conservation. Mangroves, estuaries, and wetlands are among the most productive ecosystems on Earth. Backing restoration projects, financially or physically, strengthens the buffer between land and sea. 
  • Volunteer with conservation organisations. CVA and many other groups offer hands-on programs in revegetation, citizen science, wildlife monitoring, and community education. 
  • Choose sustainable seafood. Look for certification from the Marine Stewardship Council (MSC) or equivalent bodies, and support fisheries committed to responsible practice. 
  • Reduce your carbon footprint. Ocean warming and acidification are climate problems. Reducing energy use, using public transport, and supporting renewable energy all contribute. 
  • Raise awareness with specifics. Sharing concrete facts, such as the rate of plastic entering our oceans, tends to shift understanding more than broad calls to “save the oceans.” 
  • Advocate for stronger policy. Marine protected areas, coastal planning legislation, and biodiversity targets need public and political support to hold. 

This World Ocean Day, CVA is calling on our community to look at the conservation work happening in your region, including wetlands, waterways, and coastlines, and consider where you can plug in. The ocean’s recovery depends on action that is local, consistent, and connected to the bigger picture.