Climate change is impacting chemical communication in marine, freshwater and land-based species, leading to significant changes in their behaviour, according to a recent study. Infochemicals, which play an essential role in ecological processes and interactions between different organisms, are being altered by changes in temperature, carbon dioxide and pH levels, causing various species to lose their ability to communicate effectively. Addressing the potential impact of chemically mediated relationships between disease-causing pathogens and their hosts is critical to understanding how communication breakdowns may affect human health.