World Geography
Which among the following statements is/are correct about Dust particles in the Earth’s atmosphere?Higher concentration of dust particles is found in equatorial and polar regionsThey are generally found in the lower layers of the atmosphereSelect the correct code from the options given below:

Only 2
Neither 1 & 2
Only 1
Both 1 & 2

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World Geography
Which among the following region has the highest density of rail network?

Eastern Asia
North America
Western Europe
South east Asia

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