What happened in this Energy story?

A year-long field study in two London neighbourhoods finds that planted front gardens offer measurable protection from roadside pollution and summer heat, prompting researchers to call for guidance and incentives that reconcile greenery with parking, accessibility and maintenance.

What is a key fact in this story? (1)

**Prashant Kumar**, of the University of Surrey, coordinated the year-long field study in two London neighbourhoods, measuring pollution in eight gardens beside busy roads — one set about 10 metres from the North Circular Road, the other roughly 15 metres from a busy road in east London.

What is a key fact in this story? (2)

**Hedges and dense vegetation** delivered the lowest particle pollution across the eight monitored gardens, with the best-performing garden showing up to 80% lower levels than paved gardens; lawns produced stable, consistently low readings.

Greener front gardens could help combat air pollution and summer heat — SkimNews

By The Guardian Environment · Summarized & edited by Kapil Samant · 2026-10-30

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Prashant Kumar, of the University of Surrey, coordinated the year-long field study in two London neighbourhoods, measuring pollution in eight gardens beside busy roads — one set about 10 metres from the North Circular Road, the other roughly 15 metres from a busy road in east London.
Hedges and dense vegetation delivered the lowest particle pollution across the eight monitored gardens, with the best-performing garden showing up to 80% lower levels than paved gardens; lawns produced stable, consistently low readings.
Paved gardens logged the highest temperatures and the highest pollution, running up to 6C hotter in summer than gardens with abundant vegetation — Kumar said the cooling effect was clearest and that keeping front gardens planted makes a meaningful difference during hot nights.
Hedges, shrubs and trees can redirect the flow of pollution from nearby roads, trap particles on their leaves and absorb gaseous pollutants through leaf pores; Kumar argued that reducing pollution directly outside the home means less may enter indoors.
Front gardens shielded homes from local road pollution but offered less protection in spring, when pollution from agriculture and farming spread across wide areas.
Greater London has domestic gardens covering 41% of the city, against 27% in Cardiff and 23% in Edinburgh, while the UK's 26 million gardens account for nearly 5% of the country's land area.
Karina Corada-Pérez, first author at the University of East London, acknowledged the real pressure to pave front gardens for low-maintenance space and off-street parking, and called for guidance and incentives balancing parking, accessibility and maintenance against health, climate and environmental benefits.

Why it matters: Homeowners who paved over their front gardens are losing the most: the best-performing garden showed 80% lower particle pollution than paved plots, and leafy gardens ran up to 6C cooler in summer. With gardens covering 41% of London, retaining hedges sits at the intersection of household practicality and citywide air quality and heat.