A new study reports that people exposed to secondhand smoke have higher levels of cadmium in their blood than people who are not exposed in smoke-free environments. Cadmium is a toxic metal that has been associated with increased cancer risk in scientific literature. The report says the difference is substantial, with exposed individuals showing about 1.5 times higher cadmium levels than non-smokers. The articles describe the findings as evidence of biological exposure to smoke-related toxins among those who do not actively smoke. The coverage emphasizes that cadmium is present in tobacco smoke and can enter the bloodstream of people exposed to it indirectly, including in homes or other settings where smoking occurs. The reports do not describe specific study details such as sample size, methods, or study design in the provided excerpts, nor do they address how the results translate to actual cancer outcomes. Overall, the sources agree that secondhand smoke exposure corresponds to higher blood cadmium concentrations.