6. Original use to raise public awareness

When it comes to airborne environments, exposure-indicating plants provide us with information on how dangerous pollutants are for living beings. When their damage is visible, such as the appearance of leaf necrosis, these plants become real tools for communicating and raising public awareness of air quality issues [9] .

They are of enormous educational interest to users in both urban and rural areas, because :

• they visualize the presence and impact of pollutants;

• they provide information on pollution levels that can be understood more quickly than the measurements provided by physico-chemical sensors;

• they raise awareness of the environmental and health risks incurred by living organisms...