Gas boilers now biggest source of air pollution in central London, study shows

The introduction of the Ultra Low Emission Zone (ULEZ) in central London has significantly cut road vehicle pollution, enabling clearer identification of other pollution sources. A study from the University of York revealed that gas boilers in institutional buildings now account for nearly 75% of the nitrogen oxides (NOx) pollution remaining in the area. This shift emphasizes the need for action against combustion sources, highlighting the air quality improvements possible from transitioning to heat pumps, in addition to their decarbonisation benefits.

"Our research highlights how much NOx emissions from transport have improved, but also the task still ahead in getting combustion out of cities."

"Whilst talk of switching from gas to heat pumps is mainly framed around the decarbonisation benefits, it would be a major gain for air quality too."

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