London issues high air pollution alert as PM2.5 levels cross WHO limit by 8 times

London Mayor Sadiq Khan issued a high air pollution alert for the capital urging residents to take precautions. Vulnerable groups were particularly advised to minimize their exposure to polluted air, following high pollution levels. Government monitoring indicated that numerous locations exceeded healthy particulate matter levels due to weather conditions and celebrations. Experts suggested that domestic burning and transportation significantly contribute to air quality issues.