This latest design doesn't actively combat pollution, but it has a similarly important role - preservation.
Architecture studio EFFEKT has designed a walkway to take hikers, tourists and fans of the great outdoors through, above and around a stunning forest in Denmark, without damaging or harming the the environment.
The wooden walkway leads guests through a volière with different birds to various mini observation decks, and finally culminates with a trip to the giant observation tower.
The 45m tall tower consists of a ramp which will take visitors up to the treetops, offering stunning 360 degree views of the hilly landscape, something relatively unique to region.
The unique and visually stunning project is currently expected to be finished in 2018, and you find out more information here.