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Yamuna may be less polluted this Durga Puja

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New Delhi: If all goes well, the Yamuna river may be less polluted this Durga Puja.

Puja committees across Delhi seem to have gone all out to ensure that the idols of goddess Durga are made using eco-friendly materials. This follows a National Green Tribunal (NGT) order that prohibits immersion of the idols made using non-biodegradable materials — because they further pollute an already polluted Yamuna.

Those organising Durga Pujas here say they are aware of the NGT fiat.

“Our idols have been prepared using natural colours. We are using products which do not cause any harm to the environment,” Shekher Guha, Secretary of Delhi’s CR Park Mela Ground Durga Puja Committee in south Delhi, told IANS.

Guha’s team organises one of the biggest — and perhaps most crowded — Durga Pujas in the capital, the main reason being CR Park is dominantly populated by Bengalis.

Puja committees have restrained the idol makers from using chemicals, paints, glitters and plastics which don’t get dissolved in the water body, he said.

The NGT had in September banned immersion of idols made from non-biodegradable material like quick-setting gypsum plaster, also known as Plaster of Paris, or plastic in the Yamuna river.

“Immersion should be allowed only of (idols) made from biodegradable material and not plastic/Plaster of Paris. Only those colours should be used on the idols which are environment- friendly,” the NGT had said.

Guha said the idol markers had embraced the idea of a “pollution-free puja”.

“A few organisers have even prepared small ponds near the ‘pandal’ where they plan to immerse the smaller idols,” Guha said.

Pradip Majumder, vice president of the South Delhi Durga Puja Joint Procession Committee, explained to IANS the steps being taken to comply with the NGT order. He said cranes and other machinery would be deployed at the Kalindi Kunj Ghat along the Yamuna to scoop out the idols within minutes of their immersion.

Every year thousands of idols of Durga, Lakshmi, Saraswati, Ganesh and Kartik are immersed into the Yamuna, resulting in further deterioration of its pollution levels.

Delhi, home to a huge Bengali population, organises hundreds of Durga Pujas every year. Majumder couldn’t estimate the total in Delhi but said south Delhi itself has played host to “100 Durga Pujas”.

A senior Delhi government official told IANS that the administration was going all out to ensure the NGT order.

“We are taking adequate measures to see that the pollution level in the Yamuna doesn’t go up because of Durga Puja,” he said.

Yamuna, which Hindus consider a holy river, originates at Yamunotri, in the Himalayan range. Its water quality is generally considered “okay” till it flows through Haryana and reaches Delhi where it flows in the capital’s eastern fringe. This is where all the immersions take place.

When the Yamuna enters Uttar Pradesh, pollution intensifies — making the once lively river, which merges with the Ganges in Allahabad, dirty as well as stinking in most places.

(by Priya Yadav, IANS)

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Researchers Develop New Framework To Select Best Trees For Fighting Air Pollution

Air pollution is responsible for one in every nine deaths each year and this could be intensified by projected population growth

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In a study, published in the journal Climate and Atmospheric Science, researchers from the University of Surrey conducted a wide-ranging literature review of research on the effects of green infrastructure (trees and hedges) on air pollution. Pixabay

Researchers, including one of Indian-origin, have developed a new framework for selecting the best trees for fighting air pollution that originates from our roads.

In a study, published in the journal Climate and Atmospheric Science, researchers from the University of Surrey conducted a wide-ranging literature review of research on the effects of green infrastructure (trees and hedges) on air pollution.

“We are all waking up to the fact that air pollution and its impact on human health and the health of our planet is the defining issue of our time,” said study researcher Prashant Kumar, Professor at the University of Surrey in the UK. “Air pollution is responsible for one in every nine deaths each year and this could be intensified by projected population growth,” Kumar added.

The review found that there is ample evidence of green infrastructure’s ability to divert and dilute pollutant plumes or reduce outdoor concentrations of pollutants by direct capture, where some pollutants are deposited on plant surfaces.

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As part of their critical review, the researchers identified a gap in information to help people – including urban planners, landscape architects and garden designers – make informed decisions on which species of vegetation to use and, crucially, what factors to consider when designing a green barrier. To address this knowledge gap, they identified 12 influential traits for 61 tree species that make them potentially effective barriers against pollution.

Beneficial plant properties include small leaf size, high foliage density, long in-leaf periods (e.g. evergreen or semi-evergreen), and micro-characteristics such as leaf hairiness. Generally detrimental aspects of plants for air quality include wind pollination and biogenic volatile organic compound emissions.

Air Pollution, Global Warming, Mask, Doctor, Protection
Researchers, including one of Indian-origin, have developed a new framework for selecting the best trees for fighting air pollution that originates from our roads. Pixabay

In the study, the team emphasised that the effectiveness of a plant is determined by its environmental context – whether, for example, it will be used in a deep (typical of a city commercial centre) or shallow (typical of a residential road) street canyon or in an open road environment.

To help concerned citizens with complex decisions, such as which tree is best for a road outside a school in a medium-sized street canyon, the research team has also developed a plant selection framework. “The use of green infrastructure as physical barriers between ourselves and pollutants originating from our roads is one promising way we can protect ourselves from the devastating impact of air pollution,” Kumar said.

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“We hope that our detailed guide to vegetation species selection and our contextual advice on how to plant and use green infrastructure is helpful to everyone looking to explore this option for combatting pollution,” he added. (IANS)