DELHI IS A GAS CHAMBER:
For Delhi to breathe, many things need to fall into place. A look at what’s going wrong and needs to be fixed Delhi’s geography, its high car population, stubble burning in neighbouring states — all play a role in making the region a gas box this time of the year. There are some factors that Delhi can control — like reducing its car dependency by boosting its public transport network on a war-footing — but, equally, weather conditions — like wind speed and direction — play a role over which it has no control. States like Punjab need to finally wake up and put an end to stubble burning. For Delhi to breathe, many things need to fall into place. Here’s a look at what’s wrong.
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IT HAS A LOT TO DO WITH DELHI’S LOCATION AND THE WEATHER
How is Smog formed?
- During periods of high pressure in winter caused by the cooler air that tends to descend, solar radiation hits the ground and warms it.
- This warm air rises and ends up acting as a lid when, in the absence of cloud cover on clear winter nights, the ground loses heat rapidly and the air in contact with the ground becomes cooler.
- The cold air is rapped close to the ground by the warm air that had risen above.
- The pollution from different source like vehicles, factories, construction, stubble burning, etc.. is also trapped and the layer closest to the ground becomes more and more polluted.
- These conditions change only with the change in weather.
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Source : Times of India