Along the heavily polluted Pasig River in Manila, the Philippines, you will find an innovative 37 metre floating billboard made of chrysopogon zizanioides, more commonly known as vetiver; a perennial grass native to India.

This design which spells out ‘Clean River Soon’, tries to achieve just that. Vetiver grass can improve water quality by trapping debris, sediment, and particles, and absorbing pollutants such as agrochemicals and heavy metals like lead, arsenic, manganese, and copper.

Of course, this grass cannot completely clean the river, but this is one tiny part of a much larger environmental rehabilitation project on this river. Per some reports, the year 2018 saw wildlife returning to this river at a level not seen in decades.
-Jean
Photos courtesy of Shokubutsu Hana

(Source: facebook.com)