27/04/17

Delhi’s pollution woes traced to trucks

人们试图在卡车熏蒸时保护自己免受烟雾的侵害
Copyright: Panos

Speed read

  • The odd-even scheme was implemented at daytime to cut traffic and air pollution
  • 但是,夜间挤压卡车的排放使该计划无效
  • Improving fuel quality and public transport are among possible solutions

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[新德里] 2016年,德里地方政府试验,允许私人汽车仅在替代日期铺平道路,这是根据奇数甚至注册号的规定。该计划引起了很大的兴趣,但是尚不清楚它是否成功地改善了德里的​​空气质量。

最近studysays that the ‘odd-even’ scheme did have a positive impact. The gains from halving the number of private cars on the roads, however, were offset by emissions from heavy goods vehicles that were allowed to ply during night hours, according to the study carried out by researchers from the University of Surrey and the University of Birmingham in the UK and the Indian Institute of Technology and the National Environmental Engineering and Research Centre based in New Delhi.

“一种方法是使用更清洁的燃料和technology for all vehicles.”

Ashish Verma, Indian Institute of Science

These results show that cutting down空气污染requires much more planning than simply reducing the number of vehicles on the road.

该研究的主要作者兼萨里大学教授Prashanth Kumar说:“限制允许卡车进入德里的夜晚将有助于降低污染水平,因为这将使污染物有时间分散。”

班加罗尔印度科学学院副教授Ashish Verma说:“但是,重型货车的问题很难解决,因为它对于经济活动至关重要。”“一种方法是使用更清洁的燃料和technologyfor all vehicles.”

Vehicle exhaust, emissions from industries, biomass burning, and the burning of agricultural waste in the northern plains together make Delhi’s air highly polluted. The suspended particulate matter concentration in Delhi and in many other Indian towns and cities, far exceeds WHO guidelines.

While the use of public transport can reduce traffic congestion and air pollution, Indian cities lack a publictransport systemthat provides end-to-end connectivity, says Ashish Verma, associate professor at the Indian Institute of Science, Bangalore.

“一组互补的policieslike congestion charges, parking restrictions, priority for public transport, pedestrianisation and incentives for clean transport modes are also required,” Verma says.

Kumar believes that while improving the fuel quality could pay dividends as it cut emissions at the source, “a more sustainable solution lies in strengthening public transport and introducing electric and hydrogen-fuel vehicles”.

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