Contribution to poor air quality in Portsmouth

• When the top 3 rankings are aggregated, road traffic from vans/lorries/HGVs is the top contributor to poor air quality in Portsmouth, ranked first, second or third by 65% of respondents, with road traffic from cars in second place (ranked first, second or third by 60% of respondents)
• Freight traffic at the port is the next highest factor ranked anywhere in the top 3 contributors to poor air quality (33%), closely followed by shipping at Portsmouth International Port (31%)
• Agriculture is selected least often as a top 3 contributor to poor air quality (6%)

This chart shows the proportion of respondents ranking each factor in the top three contributions to poor air quality:
65% Road traffic – vans/lorries/HGVs
60% Road traffic – cars
33% Freight traffic at Portsmouth International Port
31% Shipping at Portsmouth International Port
26% Road traffic – buses
20% Industry/factories
18% Burning of fuels in people’s homes
16% Pollution from outside the city
15% Royal Naval Dockyard
6% Agriculture