Oceans. They span the majority of Earth’s surface and are home to some of the world’s most beautiful creatures. However, rising sea levels caused by global warming now threaten millions of people living in coastal cities around the world. Places such as Miami and Rotterdam have devised innovative ways to protect their infrastructure and citizens from extreme flooding. While initiatives such as these will take both time and money, there are simple actions we can take now that will go a long way in mitigating the effects of rising sea levels.