MIT engineers make filters from tree branches to purify drinking water

The interiors of nonflowering trees such as pine and ginkgo contain sapwood lined with straw-like conduits known as xylem, which draw water up through a tree’s trunk and branches. Xylem conduits are interconnected via thin membranes that act as natural sieves, filtering out bubbles from water and sap.
Read more: https://news.mit.edu/2021/filters-sapwood-purify-water-0325?source=Snapzu