In the 'Matter' series of visual artist Sophie Dumaresq, the intervention takes place directly in nature. Photography thus becomes a register, a documentation of a performative act. In a dystopian and abandoned climate, we observe the remains of chemically treated hair. A presence that appears immediately toxic. Like a land offended and polluted by the abuse of fertilizers and chemicals which becomes a carrier of poisons and diseases. Progress as a surprise boomerang, the human species has implemented self-injuring actions that threaten its very survival. Again we tend to reflect on the use of the technique, its results and its impacts. A clear message, those who damage nature damage themselves. In fact, toxic agriculture leads to hormonal damage that causes hair loss, for example. The circle closes. What is a sign of a vanished civilization, a projection of a failed future, becomes a warning, a signal. But how many signals will still be needed to reverse the course? Are we still in time or would we be forced to watch our disappearance powerless?