Environmental Science
The expansion on PQLI is

Poor quality of life in India
Physical quality of life index
Poverty, quality of life in India
Population quotient of life in India

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Environmental Science
The aurora is produced by:

Reflections of sunlight by polar ice fields
Fast-moving charged particles colliding with air molecules
Scattering of sunlight in the upper atmosphere
Burning oxygen caused by the intense sunlight at high altitude
The combination of molecular and atomic oxygen to form ozone

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Environmental Science
Which of the following statements is not correct?

A change in the air temperature can change the relative humidity.
During the winter, low relative humidity can irritate the mucus membranes in the nose and throat.
The relative humidity is a measure of the air's actual water vapor content.
The length of human hair changes as the relative humidity changes.

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