Trees and other plants give off chemicals, called volatile organic compounds (VOCs.) The emission rate of these gases and molecules enables plants to communicate, contributes to cloud formation and affects air quality as well as the health of forests. VOCs are also responsible for what we associate as the fragrance of a forest. These emissions are very specific for each individual plant so each tree generates its own cloud.

One Tree ID, by Agnes Meyer-Brandis, transforms the ID of a specific tree into a perfume that can then be applied to the human body.

When wearing that perfume, a person can not only borrow some of the characteristics of the tree he/she is standing next to, but also use parts of its communication system and potentially have a conversation that —although imperceptible for the human communicator— might still take place on the biochemical level plants use for information exchange. 3 perfumes “Cloud of the Roots”, “Cloud of the Tree Stem” and “Cloud of the Tree Crone”. The visitors can apply the perfume and then have a talk with the tree, following an experiment routine, with a start and stop, so they could potentially track and measure the dialogue between tree and human.