World Geography
The Plio-Pleistocene boundary lies about ____ years ago, at the beginning of the interval of warming after the last Pleistocene glaciations.

10000
100
1,00,000
1000

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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 1
Both 1 & 2
Only 2
Neither 1 & 2

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