Brazil is facing severe environmental challenges as forest fires in the Amazon region lead to hazardous air quality, particularly affecting residents in Porto Velho, where sunlight has been obscured by thick smoke. The concentration of cancer-causing PM2.5 particles has reached alarming levels, raising health concerns. Concurrently, residents in South Texas are experiencing similar issues due to smoke from a landfill fire in Matamoros, Mexico, prompting local officials to advise staying indoors and wearing masks. The fire has generated a strong burning smell and thick smoke that has affected communities across the U.S. border. A recent Rutgers study also highlights the dangers of wildfire smoke from Canada, which has contributed to hazardous air quality in New Jersey, especially impacting vulnerable populations. These incidents underscore the growing public health threat posed by various sources of air pollution, exacerbated by climate change.