Billboards are usually just meant to promote a product or Donny and Marie Osmond’s latest casino residency, but this sign in the Philippines is doing a lot more — it’s reducing air pollution, too.

Coca-Cola and the World Wide Fund for Nature (known Stateside as the World Wildlife Fund) collaborated on a 60-by-60 foot billboard made of 3,600 potted Fukien tea plants. The plants are potted in discarded bottles from Coca-Cola company products and specially modified to grow sideways with an efficient drip irrigation watering system. The billboard can absorb as much as 46,800 pounds of carbon dioxide a year.

It may only be a drop in the bucket, but it’s a terrific start.

[via Good]