Skip to content
Search

Latest Stories

Indian Origin Scientist In UK Proves Planting Hedges Reduces Near Road Pollution

A group of scientists in the UK including one of the Indian origin, professor Prashant Kumar, found that planting roadside hedges, rather than relying on the trees can significantly cut down the air pollution exposure from cars in near road environment.

Scientists from University of Surrey analysed how three categories of road-side green infrastructure trees, hedges, and a combination of trees with hedges and shrubs affected the concentration levels of air pollution.


In a paper published in Atmospheric Environment, researchers from the Global Centre for Clean Air Research (GCARE), the study used six roadside locations in Guildford, UK, as test sites where the green infrastructure was between one to two metres away from the road.

The researchers found that roadsides that only had hedges were the most effective at reducing pollution exposure, cutting black carbon by up to 63 per cent. Ultrafine and sub-micron particles followed this reduction trend, with fine particles (less than 2.5 micrometres in diameter) showing the least reduction among all the measured pollutants.

The maximum reduction in concentrations was observed when the winds were parallel to the road due to a sweeping effect, followed by winds across the road. The elemental composition of particles indicated an appreciable reduction in harmful heavy metals originating from traffic behind the vegetation.

The hedges only and a combination of hedges and trees emerged as the most effective green infrastructure in improving air quality behind them under different wind directions.

Roadsides with only trees showed no positive influence on pollution reduction at breathing height (usually between 1.5 and 1.7m), as the tree canopy was too high to provide a barrier, filtering effect for road-level tailpipe emissions.

Professor Prashant Kumar, the senior author of the study and the founding Director of the GCARE at the University of Surrey, said, “many millions of people across the world live in urban areas where the pollution levels are also the highest. The best way to tackle pollution is to control it at the source. However, reducing exposure to traffic emissions in near-road environments has a big part to play in improving health and well-being for city-dwellers. The iSCAPE project provided us with an opportunity to assess the effectiveness of passive control measures such as green infrastructure that is placed between the source and receptors.

“This study, which extends our previous work, provides new evidence to show the important role strategically placed roadside hedges can play in reducing pollution exposure for pedestrians, cyclists and people who live close to roads. Urban planners should consider planting denser hedges, and a combination of trees with hedges, in open-road environments.

“Many local authorities have, with the best of intentions, put a great emphasis on urban greening in recent years. However, the dominant focus has been on roadside trees, while there are many miles of fences in urban areas that could be readily complemented with hedges, with appreciable air pollution exposure dividend. Urban vegetation is important given the broad role it can play in urban ecosystems and this could be about much more than just trees on wide urban roads”, adds Professor Kumar.

More For You

nintendo switch 2

The new console aims to build upon the success of its predecessor while introducing fresh innovations

Getty

Nintendo unveils Switch 2 - A new era for hybrid gaming begins

After months of speculation and cryptic teaser campaigns, Nintendo has officially announced the highly anticipated successor to its bestselling hybrid console. The Nintendo Switch 2 is set to launch on 5 June, with a price tag of £395.99 for the base package and £429.99 for a bundle including Mario Kart World. With a range of hardware improvements, redesigned controllers, and an exciting lineup of games, the new console aims to build upon the success of its predecessor while introducing fresh innovations.

A Bigger, Sharper Display and 4K Support

One of the most noticeable upgrades in the Nintendo Switch 2 is its display. The console now features a larger 7.9-inch screen, boasting twice the pixel count of the original Switch and supporting full 1080p resolution. Additionally, the display is capable of up to 120 frames per second, ensuring smoother animations, while high dynamic range (HDR) enhances colour contrast for a richer visual experience. Despite these improvements, the Switch 2 maintains the same thickness as the original model, preserving its signature portable form factor.

Keep ReadingShow less
‘All options on the table’ as Britain
prepares for likelihood of US tariffs

Sir Keir Starmer with Jonathan Reynolds

‘All options on the table’ as Britain prepares for likelihood of US tariffs

BRITAIN is likely to be hit by US tariffs despite making “rapid progress” over a trade deal with Washington, prime minister Sir Keir Starmer said on Tuesday (1).

He spoke as US trading partners around the world braced for an expected fresh raft of tariffs from president Donald Trump, in addition to levies already imposed on steel and those set to take effect this week on cars.

Keep ReadingShow less
single-use vapes-iStock

Analysis by Material Focus estimates that 8.2 million vapes are discarded or littered each week in the UK—equivalent to 13 every second. (Representational image: iStock)

iStock

Shops told to clear single-use vapes before ban starts on June 1

SHOPS across the UK have until 1 June 2025 to sell off remaining stocks of single-use vapes before a nationwide ban comes into force.

The legislation, confirmed last year, follows a government consultation that showed strong support for restricting their sale and supply.

Keep ReadingShow less
Primark-London-Getty

During his 15-year tenure, Marchant expanded Primark’s store network to more than 450 locations across 17 countries in Europe and the United States. (Photo: Reuters)

Primark chief Paul Marchant steps down after misconduct probe

PAUL MARCHANT, the head of fashion retailer Primark, has resigned with immediate effect after admitting to an "error of judgment" in his behaviour towards a woman in a social setting.

Associated British Foods (AB Foods), Primark's parent company, announced his resignation on Monday.

Keep ReadingShow less
Jaguar’s bold gamble: Can it woo young, wealthy drivers with a £123k EV?

Jaguar’s bold gamble: Can it woo young, wealthy drivers with a £123k EV?

JAGUAR’S ambition to seduce younger, richer drivers was on full display in Paris with a presentation of its newest prototype, the Type 00, which promises all-electric luxury... at a steep price.

The low-slung, muscular-looking concept car presented to European reporters last Friday (21) prefigures a production model expected mid-2026 at a base cost of €150,000 (£123,472.8).

Keep ReadingShow less