The hypothesis that workplace exposure to extreme heat is a leading causal factor helped make CKDnt emblematic of the need for a new science of planetary health. A desire to test that hypothesis has drawn international occupational health researchers to the sugarcane zone. While the coming of such research offers some hope to workers, this chapter shows how the recent scientific and corporate focus on mitigating heat elides the fact that rising heat is enabled by national policies and transnational industry norms that permit the expanded use of agrochemicals. The systematic push to find ways of continuing to profitably produce sugarcane under conditions of extreme heat was paralleled by the efforts of nonworkers, particularly women, to make knowledge claims about the slower and more accretive changes in climate wrought by chemically driven cane production.