Why did the nineteenth century see so little progress in addressing smoke pollution, even as smoke was increasingly recognised as a problem and economical technological solutions were identified? This article argues that efforts to abate smoke were impeded by the antagonistic class relationship between stokers and manufacturers, which prevented the emergence of a mutually beneficial compromise around smoke abatement. Employers sought to reduce smoke by compelling their stokers to take greater care under the threat of punishment. Law played an important role, siding with employers to impose liability for smoke pollution on stokers. Even when stokers were not prosecuted directly, employers often demanded indemnities as compensation for careless stoking. This reinforced mistrust between the two classes, undermining efforts to bring stokers on board with the goal of abating smoke. These findings may offer lessons today, as climate policy continues to be opposed despite the availability of green technologies and the existence of a scientific consensus on climate change.