Our oceans and seas are being threatened and destroyed by human activities like marine pollution, overfishing, and destruction of marine habitats. Oceans cover three quarters of the earth's surface, and they are home to nearly 200,000 species. That marine and coastal biodiversity isn't just beautiful; it provides the livelihoods of more than 3 billion people. We can stop and reverse the damage we have done to our world's oceans if we act quickly to conserve and protect our marine resources and habitats.