DEAR CLIMATE‘s posters employ an activist agitprop style. Playful and absurd, they highlight the need to think simultaneously on several scales and connections. Can the Substrate Speak?, a piece created for Art Souterrain, expands a key question in postcolonial studies (“Can the SubalternsSpeak?” Gayatri Spivak), to planetary environmental politics. It is an invitation to open our eyes to the blind spots that make possible the destructive extractivism specific to modernity, but it is also, and more importantly, an invitation to open our ears to the ancient and essential relationship of humanity with the lithosphere, the soil and the stone from which we build our worlds. In this poster series, DEAR CLIMATE’s agenda of “speculative biophilia” speaks to the wisdom and wonders buried within and beneath the surfaces of our lives.