Harrow is the second ‘greenest’ borough in London, according to the latest government statistics.

Data assessed by Switchcraft showed that just 2.39 tonnes of carbon dioxide was emitted per person in the borough two years ago. Only in Hackney – at 2.32 tonnes – was this figure lower.

It represented a marked change from 2007, when each Harrow resident contributed 4.2 tonnes of carbon dioxide emissions.

In July, Harrow Council declared a climate emergency, set a target to be carbon neutral by 2030 and said it has a responsibility to act on climate change to avoid “permanent damage” to the planet.

The same proposals were put forward by neighbouring Brent Council, which has also seen a reduction in carbon dioxide emissions since 2007.

In 2017, there were 2.8 tonnes per person emitted – a 43 per cent drop from 4.9 tonnes ten years earlier.

Cllr Krupa Sheth, responsible for the environment at Brent Council, said: “It’s brilliant to see the progress that has been made in the borough on lowering our CO2 emissions.

“From greener streetlights to helping people switch to cleaner modes of transport, we’ve been playing our part and there is plenty to celebrate.

“That said, we have a huge challenge ahead of us and we must now join with local residents and businesses to build on these existing initiatives.

“Only together will we achieve our aim of working towards carbon neutrality by 2030.”

The City of London had the highest number of CO2 emissions per person in 2017, followed by Westminster and Kensington and Chelsea.

Tower Hamlets saw the greatest decrease in its output between 2007 and 2017, dropping emissions by more than 60 per cent.