In these question you have two brief passages with six questions following the passage. Read the passage carefully and choose the best answer to each question out of the four alternatives
Many of the poor, young lads who until not too long ago used to sell such odd items as 'agarbattis' and wiper dusters on New Delhi's many traffic intersections have now shifted to selling small contraptions to be put on the nose in order to reduce the intake of smoke emitted by the vehicles. This, in a sense, must be a sign of the things to come in this overcrowding metropolis. The air pollution levels in Delhi are the worst at traffic light crossings. It is not only due to the increasing number of vehicles in the city, but also because the drivers keep the engines running even while waiting for the lights to change. This is an unnecessary generation of air pollution and an avoidable wastage of precious fuel. It is typical of the drivers in the capital that they are ever so eager to advance even by a couple of inches while waiting for a traffic jam to get sorted. In fact, it should be the job of the traffic police to direct the waiting vehicles in different streams to switch off the engines. For only one stream can have right of way at a time. Some of the drivers even make the rush hour traffic snarls worse by their habit of forward inching. The attendants at petrol stations often in a tearing hurry to move with their dripping hose nozzles from one vehicle to another are yet another source of fuel wastage. But who cares so long as it is the customer who pays
The author especially refers to crossroads because
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