World Seagrass Day, 1 March Photo: Benjamin L. Jones / Unsplash https://www.un.org/en/observances/seagrass-day Proclaimed from 2022, this World Day is to draw attention to this important part of 0.1% of the ocean, a habitat to thousands of species, a water filter, and a large absorber of carbon. Despite this, they are still in danger of decline