This project uses cyanotype printing to express the impact of human-made pollution on plants. Cyanotype is used to express the subtle effects of environmental contamination on the leaves and flowers of different plants. The varied polluted environment of London can be seen through small aesthetic shifts, that are created by damage to the internal structure of the plant, and chemical composition. Sensitive plants respond faster, acting as indicator species to contamination and air pollution.

For example, morning glories are blue in the morning and turn red in the afternoon. This is because the carbon dioxide content in the air is different from morning to night. The amount of carbon dioxide absorbed by morning glories is also different. The acidity in the flowers continues to increase, causing the flower colour to change from morning to night. Blue turns to red. In an increasingly polluted world, we should perhaps pay close attention to signals and messages sent by plants. Plants are often thought of as static objects, unable to communicate or react to their surroundings. However, research shows that plants can communicate through their roots, secreting minute amounts of specialized chemicals into the soil throughout the plant's root zone. Known as root exudates, these chemicals send air signals to all other organisms in the root zone to communicate with each other and can simultaneously "talk" to surrounding trees and respond accordingly to changes in their surrounding environment. This work adopts the cyanotype method, which is silent rather than loud, to indirectly express the information conveyed by trees to the environment.

Under current environmental conditions, the exaggerated impact of pollution on plants (also known as acute symptoms) is not obvious, so people usually do not notice this symptom; but cyanotype can express the intensity of sunlight, the texture of plant stems and leaves, and the thickness or damage of the leaf.

This cyanotype experiment mainly observed the impact of sulfur dioxide content in the environment on the leaves of different plants. Sulfur dioxide is primarily produced by the combustion of coal or crude oil, and so car exhaust contains a certain amount of sulfur dioxide. When sulfur dioxide in the air reaches a certain amount, it can also combine with water vapour in the atmosphere to form acid rain. Sulfur dioxide pollution often causes coloured spots or white spots to appear between leaf veins, or causes lesions to appear on the tops and edges of leaves, and there is a clear dividing line between damaged tissue and normal tissue. These cyanotypes contain different information, including the environmental status of the area and the "different responses" of different plants to forms of air pollution such as sulphur dioxide. These cyanotypes are like autobiographies of plants, recording their status and silent scream.