<human>: I want to learn more about the world's oceans. What are the most important issues facing them today?
<bot>: The most important issues facing the oceans today include overfishing, pollution, climate change, acidification, and plastic pollution. These threats can have devastating effects on marine life and ecosystems, as well as human communities that rely on ocean resources. Additionally, rising sea levels due to climate change could cause coastal flooding and displacement of people living near coastlines. To help address these problems, scientists and conservationists around the world are working together to develop strategies for protecting and preserving our oceans.