Significant greenhouse gas reduction is a major challenge due to the heterogenous structures and large number of small and varied emission sources (e.g. traffic, buildings).
Through HALO Certification, Cities bring major employers, industries, businesses and communities for joined-up action to address diverse, often related, emission sources to improve Air Quality.
Urban areas cause over 70% of direct and indirect CO2 emissions. Limiting the increase in global temperature to no more than 1.5C degrees will strain the funding and capacity of many cities.
HALO Certification creates value through opportunities for Peer-to-Peer Learning between Cities through a recognised global standard based on consistent criteria, procedures and reporting.